text: Rats May Help Unravel Human Drug Addiction Mysteries By LAURAN NEERGAARD    WASHINGTON (AP) -- Rats can become drug addicts. That's important to know, scientists say, and has taken a long time to prove...
inputs: Rats May Help Unravel Human Drug Addiction Mysteries By LAURAN NEERGAARD    WASHINGTON (AP) -- Rats can become drug addicts. That's important to know, scientists say, and has taken a long time to prove...