Six suspected tiger poachers are shot dead in a gunfight with Bangladeshi police in the world's largest mangrove forest, the Sundarbans.

The data scrambling systems used by millions of web servers could be much weaker than they ought to be, say researchers.

Drought sensitive butterfly species could be driven to extinction across the UK by 2050 according to new research.

Bee-killing Asian hornets spreading across Europe are fatally attracted to a carnivorous plant, French experts say.

A toxic leak of wastewater that has turned a Colorado river mustard yellow is three times larger than US officials had originally estimated.

Frances Oldham Kelsey, the Canadian doctor who played a central role in preventing thalidomide being distributed in the US, dies at 101.

Skywatchers are in for a dazzling display as the annual Perseid meteor shower reaches its peak on Wednesday.

A survey examining 200,000 galaxies in multiple wavelengths offers the best estimate yet of how fast the Universe is fading.