Tigre de Cristal under fire for 'abusing' rare big cat to promote gambling revolution.

Worried about the rapid destruction of permafrost from global warming? Here's how you can counter it by restoring the woolly mammoth habitat.

Most fires will not be extinguished, with major cities polluted by fumes.

Swimming 1km, in the middle of the winter, in Siberia, at water temperature of zero Celsius and air temperature below -30C.

Tsar's daughter may, after all, have escaped the execution which wiped out the royal family, says new book.

Family find her again after 9 years, now aged 25, some 4,000 km from home, but mother killed herself thinking her daughter was dead.

12,000-year-old remains of puppy were discovered perfectly intact sealed inside permafrost.

Mysterious 'gigantic' hole in remote region spotted by helicopters over gas-rich Yamal peninsula.

Mikhail Kokorich is a man who can, quite literally, say he is reaching for the stars.