In a first, researchers have imaged all of the neurons firing in a living organism - revealing how signals travel through the body in real time.
Previous estimates about the total mass of all life on our planet have to be reduced by about one third, according to a study by a German-US science team.
Researchers have discovered new evidence that may back the famous Gaia hypothesis of Earth as a living organism.
Day in Pics: 24th December
Showbiz World - December 24, 2014
Sunny Leone with Mastizaade