Comet, asteroid showers caused earlier mass extinctions
A team of researchers has blamed comet and asteroid showers for the mass extinctions occurring over the past 260 million years.
Dec 26, 2015, 12:48 PM ISTAsteroid showers caused mass extinctions on Earth
Mass extinctions which occurred over the past 260 million years were likely caused by comet and asteroid showers, scientists report.
Oct 21, 2015, 15:41 PM IST