Ashes from supernova explosions littered Earth's ocean floor
Some theories suggest cosmic rays from the supernovae could have increased cloud cover.
Apr 07, 2016, 22:17 PM IST
NASA's Hubble telescope spots images of first-ever supernova explosion
NASA`s Hubble Space has caught a glimpse of the first-ever predicted supernova explosion.
Dec 17, 2015, 10:56 AM IST