Carbon-conscious enthusiasts beg restaurants and cafes for waste vegetable oil to power their European journey, converting an estimated 350 litres of oil into fuel on their 11 day trip

Tan Tan, a giant panda at Kobe's Oji zoo in Japan, has a new cub. It is the first baby panda in 20 years to be born in Japan as a result of artificial insemination

Keith Stuart: Games are beginning to incorporate the complex interplay of organic and elemental forces that shape our own environment

Virus may have been inadvertently carried into space on an astronaut's USB drive

Obituary: Pioneering surgeon who corrected facial disfigurement

Hi-tech project could take five years and cost millions of dollars

Peta Bee: What has changed so dramatically is the ease with which consumers can now obtain these dangerously toxic concoctions

Economic growth in developing countries has translated into big increases in happiness, but people in richer countries have seen much more modest improvements

Steam power may have an old-fashioned image, but British engineers think it can improve the efficiency of the internal combustion engine

In its Grand Challenge competition, the Ministry of Defence encouraged children to get involved in the development of what was effectively one component of a weapons system. Can this ever be justified, wonders robotics professor Noel Sharkey

The undergraduate degree in homeopathic medicine at the University of Central Lancashire has been put on hold after "relentless attacks from the anti-homeopathy league"

National Institute for Health and Clinical Excellence recommends major DNA testing programme

James Randerson: Very precise electro- magnetic stimulation can have some interesting and useful effects on the brain

Obituary: His research into tropical diseases saved thousands of lives

Team randomly selects 193 remedies and detects lead, mercury or arsenic in 20.7% products

Letter: Allegations that the government neglects wellbeing of adolescents reek of hypocrisy and poor judgment

A rare glimpse into Richard Dawkins' inbox. His detractors really are a charming bunch

Noel Sharkey: There's no doubting that patients need human contact, but in many situations, robot technology is the most effective option

Scientists challenge the theory that Homo sapiens was more intelligent

A study suggests that burning joss sticks raises the risk of certain mouth, throat and lung cancers