The population of humpback whales has tripled in Brazil over the past decade, to the point that they now number some 10,000, a research institute said.
Scientists have found that humpback whales on both sides of the southern Indian Ocean sing different tunes.
Day in Pics: 22nd October
Showbiz World - October 22, 2014
Aamir Khan's sensational 'PK' posters