Air flows through lizard lungs in one direction, a finding that may prompt a rethink about how some species evolved following Earth`s biggest mass extinction, a study said on Wednesday.
Scientists have discovered thousands of fossilised poos left by rhino-like megaherbivores, 240 million years ago in Argentina, suggesting that ancient reptiles gathered together to defecate.
Day in Pics: 28th January
Showbiz World - January 28, 2015
President Barack Obama's speech at Siri Fort auditorium