NATURE

European whales, dolphins and porpoises contain among highest levels of toxic polychlorinated biphenyls on planet.

The whales were washed up on Texel Island and died overnight.

The buck apparently cradled his dying companion's head while she tried to touch her joey one last time.

Study shows Brazilian Torrent frogs have the largest number of ways to communicate of all frogs.

Animal welfare activists hail policy announcement, saying end to ivory trade 'may be in sight'.

Authorities are warning winter holidaymakers the risks of even 'spontaneous' avalanches remains 'high'.

Conservation needs the income from hunting to continue protecting species, and guidelines have been drawn up.

A study collected data from the REMUS SharkCam to discover Mexico's sharks tend to hunt from below.

The massive Nepal earthquake kept away climbers to Mount Everest.

Leading geneticists believe technology is there to create a dinosaur-chicken hybrid but it won't be easy.

The whale is believed to have been trapped for up to four days.

Scientists are successfully finding 'extinct' species of giant tortoises on Galapagos.

A hunted cougar has a set of teeth and whiskers growing out of the back of its head, in bizarre birth defect.

Understanding diet of an endangered population of killer whales will aid conservation.

Why do some animals have two tone coats?

Abandoned Peruvian pooch Estrella developed new walking skills much like a human baby.

Scientists use aversion training to stop lizards from eating deadly cane toads.

Amazing day-to-night panoramas of US National Parks such as the Grand Canyon and Yellowstone Park, by photographer Stephen Wilkes.

Giant ape that stood at 10ft tall went extinct because it could not adapt to diet and habitat changes.

10,000 humpback whales usually migrate to the Hawaiian Islands this time of year. This year, they have disappeared.

Regulated trophy hunting is allowed in the country to manage the wild animal population.

Every year, keepers at London Zoo face the challenging task of tallying up every creature from among more than 750 species.

Small chameleon tongues are much faster than larger individuals, suggests research from Brown University in the US.

Bubye Valley Conservancy in Zimbabwe is organising the event, where the winner can opt to kill a big cat.

As we move into one of the warmest winters on record, how might nature react to the changing climate?

Black shark with photophores found glowing deep down on the Pacific coast of Nicaragua and Panama.

Photographs from National Geographic's January 2016 edition explore the life of a vulture in troublesome times.

Tales of giant squid have permeated history because they are real.

Why are stripes in nature orientated in a certain direction?