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 ISTIndia's strength lies in capacity to blend contradiction: President
President Pranab Mukherjee on Thursday emphasised that diversity is an integrating factor.
Oct 15, 2015, 22:29 PM IST