A 328 million-year-old cephalopod may be the oldest in a group related to octopuses and vampire squids.
A look at the "God particle" — its theoretical origins, its discovery in 2012, and its continuing significance.
There are five basic human senses: touch, sight, hearing, smell and taste. Other senses also help us understand and perceive the world around us.
Winter, the coldest season of the year, comes between autumn and spring. It is associated with plunging temperatures and icy weather, but its impact and timing change according to location.