Many people use them interchangeably, but they mean subtly different things - yet when it comes to influencing public opinion, scientists should perhaps use the less-accurate one.
Both a neat toy and a delightful illustration of how magnetism works.
Nicholas Wade's A Troublesome Inheritance argues that the genetic differences between racial groups explain why the West is rich and Africa is poor - but beneath the new science lies an old, dangerous lie.
To celebrate 300 years since the original Longitude Prize to solve the problem of inaccurate naval navigation, the BBC and Nesta have announced a new prize aimed at solving on of six crucial problems facing humanity.
A site in the Kootenay National Park has proved a fantastic source of fossils from the Cambrian explosion, 542 million years ago.
A man taking part in the drinking dare game Neknomination drank a pint with two fish floating in it. This is very much not a good idea, for you OR the goldfish.
The physicist, whose pioneering work on black holes in the 1970s made him a household name, has proposed a radical fudge to try and resolve a baffling paradox.
Canine transmissible venereal tumours (CTVT) is one of only two natural transmissible cancers, and could hold the key to better organ transplants in humans.
An international group of researchers has found that the largest glacier in West Antarctica is "retreating inland" faster than ever.
Japanese scientists have made hundreds of tiny plastic balls float around like miniature spaceships.