In Isaac Newton's time, the terms "acceleration" and "second derivative" did not exist, so he could not have deduced F=ma, the second law of motion. This has been unscientifically credited to Newton, says a research paper.
Google on Monday honoured Swiss mathematician and physicist Leonhard Euler on his 306th birth anniversary with an animated doodle on its homepage.
Day in Pics: 28th January
Showbiz World - January 28, 2015
President Barack Obama's speech at Siri Fort auditorium