Scientists say bears in southern Greenland differ genetically to those in the north, suggesting they could adjust

Changes in polar bear DNA that could help the animals adapt to warmer climates have been detected by researchers, in a study thought to be the first time a statistically significant link has been found between rising temperatures and changing DNA in a wild mammal species.

Climate breakdown is threatening the survival of polar bears. Two-thirds of them are expected to have disappeared by 2050 as their icy habitat melts and the weather becomes hotter.

Exclusive: Use of toxic plastic beads in treatment works is unnecessary and outdated, say conservationists

The use of tiny, toxic plastic beads at sewage works should be banned nationwide, an MP and wildlife experts have said after a devastating spill at an internationally important nature reserve.

Hundreds of millions of “biobeads” washed up on Camber Sands beach in East Sussex last month, after a failure at a Southern Water sewage treatment works caused a catastrophic spill. It has distressed and alarmed local people and conservationists, as not only are the beads unsightly but they pose a deadly threat to wildlife.

Keeping reindeer in pens for public enjoyment can cause them physical and mental harm, charities warn

With their fluffy coats, big brown eyes and reputation as Santa’s helpers, reindeer are a common and popular attraction at Christmas markets around the UK.

But being stuck in a pen and approached by hordes of adoring fans is harming the mental and physical health of Rudolph and his brethren, animal charities have warned.