As pollution levels return to normal in China's capital after a record-breaking month of smog, what can be done to banish the smog?

Polar bears have been around for millions of years longer than previously thought – and might be resilient to current climate change and habitat loss.

The launch of the UK Biobank, the world's largest medical database, will reveal the effects of genes and environment on health.

A TB strain that defies all drugs has infected 12 people in Mumbai. Each may have infected dozens of others.

Some claim climate change will destroy our species; now it seems it also helped forge it. The rapid fluctuations in temperature that characterised the global climate between 2 and 3 million years ago coincided with a golden age in human evolution.

After years of hype, controversy and disappointment, stem cell treatments may finally be poised to reach masses of patients.

A definitive assessment of whether cellphones pose a risk of brain cancer to their users should be put on hold, campaigners are claiming. The mainstream view is that there is no evidence for any such risk.

Why did one nuclear site in Fukushima escape damage from the earthquake? Mike Weightman is going there to discover what lessons can be learned.

TWO months after the explosions and radiation leaks at the Fukushima Daiichi nuclear power plant in Japan, the prime minister, Naoto Kan, has announced that the country will not build any new reactors. If Kan really means it, the government will have to abandon the plans for expanding nuclear power it adopted only last year.

Bovine spongiform encephalopathy, aka "mad cow disease", is almost extinct just 25 years after it was disc