two children have been killed in what police are calling an accidental vehicle fire at a las vegas apartment complex . -lrb- cnn -rrb- -- federal health officials are investigating another possible norovirus outbreak aboard a cruise ship that just ended a caribbean voyage . the u.s. centers for disease control and prevention reported that 114 passengers and 10 crew members on the holland america cruise ship ms veendam suffered vomiting and diarrhea during a week-long voyage that ended saturday . fear of spiders is a survival trait written into our dna , researchers have discovered . dating back hundreds of thousands of years , the instinct to avoid arachnids developed as an evolutionary response to a dangerous threat , the academics suggest . it could mean that arachnophobia , one of the most crippling of phobias , represents a finely tuned survival instinct . and it could date back to early human evolution in africa , where spiders with very strong venom have existed millions of years ago . investigators say four children were playing in and around a parked minivan saturday evening at the arcadia palms on east sahara avenue when one of them unintentionally set a fire inside . two of the children managed to escape unharmed and quickly requested help . the other two children became trapped and were found dead inside after the fire was put out . two young children have died after a minivan they were playing in on the parking lot of the arcadia palms apartment complex in las vegas caught fire and exploded -lrb- police scene pictured -rrb- . police say it appears the 6pm fire was unintentional and accidental , and no criminal charges are expected because of the age of the child who started the fire . the names and ages of the children as well as the cause of the fire were not immediately released . scroll down for video . researchers say a fear of spiders is a survival trait written into our dna and dates back thousands of years , stock photo . study leader joshua new , of columbia university in new york , said : ` a number of spider species with potent , vertebratespecific venoms populated africa long before hominoids and have co-existed there for tens of millions of years . ` humans were at perennial , unpredictable and significant risk of encountering highly venomous spiders in their ancestral environments . ` even when not fatal , a black widow spider bite in the ancestral world could leave one incapacitated for days or even weeks , terribly exposed to dangers , ' he told the sunday times . los angeles , california -lrb- cnn -rrb- -- prosecutors dropped drug charges against rapper t.i. related to his arrest in west hollywood , california , last month , the los angeles district attorney 's office said . t.i. , whose real name is clifford harris , and his wife , `` tiny '' tameka cottle , were arrested on drug charges after a traffic stop on sunset boulevard in september . a cdc vessel sanitation program environmental health officer and an epidemiologist boarded the ship when it arrived in fort lauderdale , florida , on saturday , the agency said . the investigators will `` conduct an environmental health assessment and evaluate the outbreak and response activities . '' the cdc is also testing stool samples from the sickened passengers and crew , the agency said . holland america officials did not immediately respond to requests for comment . the arrest and a failed drug test the next day resulted in a federal judge in georgia ordering the rapper back to prison for 11 months for violating his probation from a weapons conviction . harris . 29 , must turn himself in next week to begin serving his prison term next week for the probation violation . defense lawyer steve sadow told cnn the decision to drop the charges was `` the right thing to do under the circumstances . '' the veendam carried 1,273 passengers and a crew of 575 , the cdc said . hundreds of people aboard two cruise ships in the caribbean fell ill with norovirus last month . the cdc reported that norovirus hit more than 600 passengers and crew on royal caribbean 's explorer of the seas in january , making it one of the biggest such outbreaks on any cruise ship in the past two decades . the caribbean princess , operated by princess cruises , cut short its seven-day caribbean itinerary last month after 178 passengers and 11 crew members were stricken with norovirus . cdc staffers helped sanitize that ship . the veendam got a failing grade from cdc inspectors who found multiple sanitation violations , including brown liquid dripping on clean dishes and a fly on the buffet , in september , the cdc said . `` both his los angeles defense attorney , blair berk , and myself commend the los angeles district attorney 's office for exercising its discretion to reject prosecution in light of the legal and factual issues involved , '' sadow said . an arraignment hearing had been set for next month , but the decision to reject charges against harris will save los angeles taxpayers the expense of flying him from a federal prison in georgia to california . no decision has been made about the drug charges against cottle , 35 , the prosecutor 's office said . kelvin young , 29 , a resident of the complex , told the las vegas review journal he went toward the burning vehicle after he saw a plume of smoke . shortly after , he described hearing a woman shout ` my baby ! ' and ` my nephew ! ' another resident told klas-tv that a woman , believed to be one of the boy 's mother , was taken to hospital shortly after the incident and described hearing a huge explosion . they said authorities informed them the pair were related . residents at the apartment complex say they heard a huge explosion followed by a massive plume of smoke . sorry we are not currently accepting comments on this article . the research team carried out an experiment in which 252 volunteers were asked to study computer screens containing abstract shapes and data . their reactions to images of spiders were very fast , even if their shape was distorted , when compared to much more clear images of other objects known induce disgust or fear , such as needles and flies . the researchers point out that spiders are often small dark creatures that tend to hide in recesses and are hard to spot . dr new said : ` detection , therefore , is the critical arbiter of success in such encounters -- any improvements to the sensitivity , vigilance , reliability and speed of faculties for their detection would have been of significant selective advantage . ' the instinct could date back to early human evolution in africa , where spiders with very strong venom existed millions of years ago . pictured : a venomous phormictopus antillensis spider . `` while unacceptable for holland america line , the unsatisfactory score is highly unusual and an aberration , '' holland america 's sally andrews said last year . inspectors do n't tell cruise lines when they 're going to show up , but they visit twice a year as part of the cdc 's vessel sanitation inspection program . the cdc grades ships on a 100-point scale . an 85 or lower is considered a failing grade . the veendam received a grade of 77 . harris acknowledged in federal court this month that he had a drug addition problem . `` i screwed up big time and i am sorry , '' harris told u.s. district judge charles pannell jr. `` i am sincerely sorry . i am scared that you will send me to prison . '' `` mr. harris has had the limit of second chances , '' pannell said as he imposed the 11-month sentence . harris received an unusual plea agreement two years ago to resolve federal gun charges . those charges followed his attempt to buy three machine guns in the parking lot of an atlanta grocery store . he served a year of house detention before he spent nine months in prison and three months in a halfway house . `` since 1996 , veendam has received passing scores on 32 inspections , '' andrews said . the veendam is a 16-year-old ship , christened by actress debbie reynolds , that can carry 1,930 passengers and crew , according to holland america . the cornerstone of the plea deal was his community service which included the rapper speaking to young people about the importance of staying off drugs and out of trouble . `` he was supposed to be living what he was preaching , '' said u.s. attorney sally yates . harris is an atlanta-based rapper , music producer and actor . he is also the head of the grand hustle record label . cnn 's brittany kaplan contributed to this report . cnn 's anneclaire stapleton contributed to this report .
new : defense lawyer steve sadow says it 's `` the right thing to do '' the arrest triggered a probation violation hearing for t.i. the rapper must return to federal prison for 11 months .
two children have been killed in what police are calling an accidental vehicle fire at a las vegas apartment complex . -lrb- cnn -rrb- -- federal health officials are investigating another possible norovirus outbreak aboard a cruise ship that just ended a caribbean voyage . the u.s. centers for disease control and prevention reported that 114 passengers and 10 crew members on the holland america cruise ship ms veendam suffered vomiting and diarrhea during a week-long voyage that ended saturday . fear of spiders is a survival trait written into our dna , researchers have discovered . dating back hundreds of thousands of years , the instinct to avoid arachnids developed as an evolutionary response to a dangerous threat , the academics suggest . it could mean that arachnophobia , one of the most crippling of phobias , represents a finely tuned survival instinct . and it could date back to early human evolution in africa , where spiders with very strong venom have existed millions of years ago . investigators say four children were playing in and around a parked minivan saturday evening at the arcadia palms on east sahara avenue when one of them unintentionally set a fire inside . two of the children managed to escape unharmed and quickly requested help . the other two children became trapped and were found dead inside after the fire was put out . two young children have died after a minivan they were playing in on the parking lot of the arcadia palms apartment complex in las vegas caught fire and exploded -lrb- police scene pictured -rrb- . police say it appears the 6pm fire was unintentional and accidental , and no criminal charges are expected because of the age of the child who started the fire . the names and ages of the children as well as the cause of the fire were not immediately released . scroll down for video . researchers say a fear of spiders is a survival trait written into our dna and dates back thousands of years , stock photo . study leader joshua new , of columbia university in new york , said : ` a number of spider species with potent , vertebratespecific venoms populated africa long before hominoids and have co-existed there for tens of millions of years . ` humans were at perennial , unpredictable and significant risk of encountering highly venomous spiders in their ancestral environments . ` even when not fatal , a black widow spider bite in the ancestral world could leave one incapacitated for days or even weeks , terribly exposed to dangers , ' he told the sunday times . los angeles , california -lrb- cnn -rrb- -- prosecutors dropped drug charges against rapper t.i. related to his arrest in west hollywood , california , last month , the los angeles district attorney 's office said . t.i. , whose real name is clifford harris , and his wife , `` tiny '' tameka cottle , were arrested on drug charges after a traffic stop on sunset explosion followed by a massive plume of smoke . sorry we are not currently accepting comments on this article . the research team carried out an experiment in which 252 volunteers were asked to study computer screens containing abstract shapes and data . their reactions to images of spiders were very fast , even if their shape was distorted , when compared to much more clear images of other objects known induce disgust or fear , such as needles and flies . the researchers point out that spiders are often small dark creatures that tend to hide in recesses and are hard to spot . dr new said : ` detection , therefore , is the critical arbiter of success in such encounters -- any improvements to the sensitivity , vigilance , reliability and speed of faculties for their detection would have been of significant selective advantage . ' the instinct could date back to early human evolution in africa , where spiders with very strong venom existed millions of years ago . pictured : a venomous phormictopus antillensis spider . `` while unacceptable for holland america line , the unsatisfactory score is highly unusual and an aberration , '' holland america 's sally andrews said last year . inspectors do n't tell cruise lines when they 're going to show up , but they visit twice a year as part of the cdc 's vessel sanitation inspection program . the cdc grades ships on a 100-point scale . an 85 or lower is considered a . cnn 's brittany kaplan contributed to this report . cnn 's anneclaire stapleton contributed to this report .
two children have been killed in what police are calling an accidental vehicle fire at a las vegas apartment complex . -lrb- cnn -rrb- -- federal health officials are investigating another possible norovirus outbreak aboard a cruise ship that just ended a caribbean voyage . the u.s. centers for disease control and prevention reported that 114 passengers and 10 crew members on the holland america cruise ship ms veendam suffered vomiting and diarrhea during a week-long voyage that ended saturday . fear of spiders is a survival trait written into our dna , researchers have discovered . dating back hundreds of thousands of years , the instinct to avoid arachnids developed as an evolutionary response to a dangerous threat , the academics suggest . it could mean that arachnophobia , one of the most crippling of phobias , represents a finely tuned survival instinct . and it could date back to early human evolution in africa , where spiders with very strong venom have existed millions of years ago . investigators say four children were playing in and around a parked minivan saturday evening at the arcadia palms on east sahara avenue when one of them unintentionally set a fire inside . two of the children managed to escape unharmed and quickly requested help . the other two children became trapped and were found dead inside after the fire was put out . two young children have died after a minivan they were playing in on the parking lot of the arcadia palms apartment complex in las vegas caught fire and exploded -lrb- police scene pictured -rrb- . police say it appears the 6pm fire was unintentional and accidental , and no criminal charges are expected because of the age of the child who started the fire . the names and ages of the children as well as the cause of the fire were not immediately released . scroll down for video . researchers say a fear of spiders is a survival trait written into our dna and dates back thousands of years , stock photo . study leader joshua new , of columbia university in new york , said : ` a number of spider species with potent , vertebratespecific venoms populated africa long before hominoids and have co-existed there for tens of millions of years . ` humans were at perennial , unpredictable and significant risk of encountering highly venomous spiders in their ancestral environments . ` even when not fatal , a black widow spider bite in the ancestral world could leave one incapacitated for days or even weeks , terribly exposed to dangers , ' he told the sunday times . los angeles , california -lrb- cnn -rrb- -- prosecutors dropped drug charges against rapper t.i. related to his arrest in west hollywood , california , last month , the los angeles district attorney 's office said . t.i. , whose real name is clifford harris , and his wife , `` tiny '' tameka cottle , were arrested on drug charges after a traffic stop on sunset explosion followed by a massive plume of smoke . sorry we are not currently accepting comments on this article . the research team carried out an experiment in which 252 volunteers were asked to study computer screens containing abstract shapes and data . their reactions to images of spiders were very fast , even if their shape was distorted , when compared to much more clear images of other objects known induce disgust or fear , such as needles and flies . the researchers point out that spiders are often small dark creatures that tend to hide in recesses and are hard to spot . dr new said : ` detection , therefore , is the critical arbiter of success in such encounters -- any improvements to the sensitivity , vigilance , reliability and speed of faculties for their detection would have been of significant selective advantage . ' the instinct could date back to early human evolution in africa , where spiders with very strong venom existed millions of years ago . pictured : a venomous phormictopus antillensis spider . `` while unacceptable for holland america line , the unsatisfactory score is highly unusual and an aberration , '' holland america 's sally andrews said last year . inspectors do n't tell cruise lines when they 're going to show up , but they visit twice a year as part of the cdc 's vessel sanitation inspection program . the cdc grades ships on a 100-point scale . an 85 or lower is considered a he spent nine months in prison and three months in a halfway house . `` since 1996 , veendam has received passing scores on 32 inspections , '' andrews said . the veendam is a 16-year-old ship , christened by actress debbie reynolds , that can carry 1,930 passengers and crew , according to holland america . the cornerstone of the plea deal was his community service which included the rapper speaking to young people about the importance of staying off drugs and out of trouble . `` he was supposed to be living what he was preaching , '' said u.s. attorney sally yates . harris is an atlanta-based rapper , music producer and actor . he is also the head of the grand hustle record label . cnn 's brittany kaplan contributed to this report . cnn 's anneclaire stapleton contributed to this report .
two children have what an accidental vehicle fire a las vegas apartment complex. -lrb- cnn -rrb- -- federal health officials another possible norovirus outbreak aboard just ended a caribbean voyage. the u.s. centers disease control reported 114 passengers on the holland america cruise ship ms veendam suffered vomiting during that saturday. fear spiders is a survival trait written our dna, researchers. dating back hundreds of thousands, the instinct avoid arachnids developed as a dangerous threat, the academics suggest it could mean arachnophobia, one crippling represents a finely tuned survival instinct. and it could date early human evolution in africa, where spiders with very strong venom have existed millions investigators say four children playing and a parked minivan saturday at the arcadia palms east sahara avenue when one unintentionally set inside. two of the children managed quickly requested. the other two children became trapped and found after. two young children have a minivan they playing on the arcadia palms apartment complex las vegas caught -lrb- police scene pictured -rrb-. police say it the 6pm fire unintentional accidental, no criminal charges because the age who started the names ages as the cause the fire were not immediately released. scroll. researchers say a fear spiders a survival trait written our dna and dates, stock photo. study leader joshua new, of columbia university new york : ` a number spider species with potent, vertebratespecific venoms populated africa long hominoids have co there. ` humans were at perennial, unpredictable and significant risk encountering highly venomous spiders their ancestral environments. ` even when not fatal, a black widow spider bite in the ancestral world could leave one incapacitated, terribly exposed dangers ' he told the sunday times los angeles, california -lrb- cnn -rrb- -- prosecutors dropped rapper t.i related west hollywood,, last. t.i, whose real name clifford harris his wife, `` tiny '' tameka cottle were arrested after sunset boulevard september. a cdc vessel sanitation program environmental health officer and boarded when fort lauderdale, florida on saturday the agency. the investigators will `` conduct an environmental health assessment evaluate the outbreak and response activities. '' the cdc is also testing stool samples the sickened passengers crew, the agency. holland america officials did immediately. the arrest a failed drug test the next resulted a federal judge in georgia ordering the rapper back prison 11 months for violating from a weapons conviction. harris. 29, must turn himself next week begin serving next for the probation violation. defense lawyer steve sadow told cnn the decision drop `` the right thing under. '' the veendam carried 1,273 passengers a crew 575, the cdc said. hundreds aboard two cruise ships the caribbean fell norovirus last. the cdc reported norovirus hit more than 600 passengers royal caribbean 's explorer of in january, making the biggest such outbreaks. the caribbean princess, operated princess cruises cut short its seven-day caribbean itinerary last after 178 passengers stricken norovirus. cdc staffers helped sanitize that ship. the veendam got a failing grade cdc inspectors who multiple sanitation violations, including brown liquid dripping clean dishes a fly the buffet, in september said. `` both his los angeles defense attorney, blair berk myself commend the los angeles district attorney 's office exercising reject prosecution in light, '' sadow. an arraignment hearing had next month, the decision reject charges harris will save los angeles taxpayers the expense flying a federal prison georgia california no decision about the drug charges cottle, 35 the prosecutor 's office. kelvin young, 29 a resident the complex, told the las vegas review journal he went toward the burning vehicle. shortly, he described hearing woman shout ` my baby! and ` my nephew another resident told klas-tv a woman, believed one the boy 's mother taken shortly described hearing a huge explosion they said authorities informed the pair related. residents at the apartment complex say heard followed. sorry we currently comments on. the research team carried an experiment 252 volunteers study computer screens containing abstract shapes data. their reactions images spiders were very fast, even their shape distorted when compared much more clear images other objects known induce disgust or such needles flies the researchers point spiders often small dark creatures tend hide recesses and are hard. dr new said : ` detection, therefore, is the critical arbiter success such encounters -- any improvements the sensitivity, vigilance reliability speed faculties for their detection would of significant selective advantage. ' the instinct could date early human evolution in africa where spiders with very strong venom existed millions pictured : a venomous phormictopus antillensis spider. `` while unacceptable for holland america line, the unsatisfactory score highly unusual an aberration, '' holland america 's sally andrews said last inspectors do n't tell cruise lines when 're show, visit twice as the cdc 's vessel sanitation inspection program the cdc grades ships on a 100-point scale. an 85 or lower is a failing grade. the veendam received a grade 77. harris acknowledged federal court this a drug addition problem. `` i screwed big time, '' harris told u.s. district judge charles pannell jr `` i am sincerely. i am scared that send to. '' `` mr harris has had the limit second chances, '' pannell said as imposed the 11-month sentence. harris received an unusual plea agreement two resolve federal gun charges. those charges followed his attempt buy three machine guns an atlanta grocery store. he served a year house detention before spent and three. `` since 1996, veendam received passing 32 inspections, '' andrews said. the veendam is a 16-year-old ship, christened by actress debbie reynolds that can 1,930 passengers according holland america the cornerstone the plea deal was his community service which the rapper speaking staying off out. `` he supposed living what preaching, '' u.s. attorney sally yates. harris is an atlanta-based rapper, music producer actor. he is also the head the grand hustle record label. cnn 's brittany kaplan contributed. cnn 's anneclaire stapleton contributed.
two children have been killed in what police are calling an accidental vehicle fire at a las vegas apartment complex . -lrb- cnn -rrb- -- federal health officials are investigating another possible norovirus outbreak aboard a cruise ship that just ended a caribbean voyage . the u.s. centers for disease control and prevention reported that 114 passengers and 10 crew members on the holland america cruise ship ms veendam suffered vomiting and diarrhea during a week-long voyage that ended saturday . fear of spiders is a survival trait written into our dna , researchers have discovered . dating back hundreds of thousands of years , the instinct to avoid arachnids developed as an evolutionary response to a dangerous threat , the academics suggest . it could mean that arachnophobia , one of the most crippling of phobias , represents a finely tuned survival instinct . and it could date back to early human evolution in africa , where spiders with very strong venom have existed millions of years ago . investigators say four children were playing in and around a parked minivan saturday evening at the arcadia palms on east sahara avenue when one of them unintentionally set a fire inside . two of the children managed to escape unharmed and quickly requested help . the other two children became trapped and were found dead inside after the fire was put out . two young children have died after a minivan they were playing in on the parking lot of the arcadia palms apartment complex in las vegas caught fire and exploded -lrb- police scene pictured -rrb- . police say it appears the 6pm fire was unintentional and accidental , and no criminal charges are expected because of the age of the child who started the fire . the names and ages of the children as well as the cause of the fire were not immediately released . scroll down for video . researchers say a fear of spiders is a survival trait written into our dna and dates back thousands of years , stock photo . study leader joshua new , of columbia university in new york , said : ` a number of spider species with potent , vertebratespecific venoms populated africa long before hominoids and have co-existed there for tens of millions of years . ` humans were at perennial , unpredictable and significant risk of encountering highly venomous spiders in their ancestral environments . ` even when not fatal , a black widow spider bite in the ancestral world could leave one incapacitated for days or even weeks , terribly exposed to dangers , ' he told the sunday times . los angeles , california -lrb- cnn -rrb- -- prosecutors dropped drug charges against rapper t.i. related to his arrest in west hollywood , california , last month , the los angeles district attorney 's office said . t.i. , whose real name is clifford harris , and his wife , `` tiny '' tameka cottle , were arrested on drug charges after a traffic stop on sunset . cnn 's brittany kaplan contributed to this report . cnn 's anneclaire stapleton contributed to this report .
 The article discusses two children who were killed in an accidental vehicle fire at a Las Vegas apartment complex. Federal health officials are investigating another possible norovirus outbreak aboard a cruise ship that just ended a week-long voyage. Researchers have discovered that arachnophobia, or fear of spiders, may be an evolutionary trait developed to help humans survive. A study suggests that people with this phobia have a stronger survival instinct and are more likely to avoid dangerous situations.