Dino-killing asteroid warmed Earth for 100,000 years: Study
Carbon dioxide released into the atmosphere after the asteroid strike that triggered the end of dinosaurs about 65 million years ago, warmed the Earth's climate for 100,000 years, as per a  study on journal Science. The study, based on analysis of oxygen isotopes in fossil records, suggested the Earth's overall temperature increased by 5 ÂºC over that time.