Life Wild bear uses a stone to exfoliate Can't "bear" that itch IT IS impossible not to scratch an itch, so it's no wonder this brown bear reached for some help. It was seen scratching its skin with rocks – the first bear definitively known to use a tool. In July 2011, Volker Deecke of the University of Cumbria , UK, was on … News
Fukushima's dirty inheritance A YEAR on, the world is still feeling the effects of the earthquake and tsunami that devastated eastern Japan. The dual catastrophe is estimated to have killed almost 20,000 people. Yet it is the consequences of the subsequent partial meltdown at the Fukushima Daiichi nuclear power plant, which has so far killed no one, that … Opinion
The first portable digital camera – cassette included See more: To see the image this article refers to, keep checking Picture of the Day on our news blog Short Sharp Science WEIGHING in at 4 kilograms and standing a proud 22 centimetres tall, this is the world's first portable digital camera. In 1975, Steve Sasson and his team at Kodak's Elmgrove plant in … Regulars
Earth How to dismantle a nuclear reactor The decommissioning of nuclear power plants will become a huge global business in the 21st century Features
The only humans left on Earth See more: An illustrated version of this article will be published within the next two weeks on our CultureLab books and arts blog In Lone Survivors, Chris Stringer explains how forensic technology offers surprising insights into our evolutionary predecessors CultureLab
Enigma Number 1688 Eight prime factors The numbers 38 and 77 are each the product of two primes; furthermore their difference (39) and their sum (115) are also each the product of two primes, and the eight primes involved are all different. There is one other pair of two-digit positive integers for which all this is true. What … Regulars
Feedback: Illegible demand for legibility Illegible demand for legibility OUR item expressing suspicion that the UK Royal Mail is deliberately smudging the printing on its "write the postcode clearly" messages (18 February) reminded Howard Greenwood that he once received a piece of homework marked by his physics teacher bearing an unreadable scrawl in the usual red ink. Howard took his … Regulars