During the Archean eon, about 3.8 billion years - 2.5 billion years ago, the Sun was about 20 to 25 percent fainter, and with less sunlight, the oceans may have frozen on Earth.
India is amongst the countries most vulnerable to climate change and must develop its own model to study changes at the regional level and take necessary mitigation measures, a senior US scientist of Indian origin said.
Day in Pics: 23rd October
Showbiz World - October 23, 2014
Aamir Khan's sensational 'PK' posters