Ban Ki-Moon urges restraint as Pyongyang announces plan to reopen nuclear reactor
New discoveries are the clearest indicator yet that life could once have existed on the red planet
The UN created the world’s most effective offset mechanism but astonishingly fails to use it for its own carbon emissions. This has to change
The Curiosity Mars rover has discovered something interesting in a scoop of ruddy sand, but Nasa scientists say they're not quite sure what it means.
Modest expectations marked the start of UN climate talks Monday, as negotiators and experts all warned that the two-week session would only lay the groundwork for a potentially ambitious global-warming pact by the end of the decade.
Killy Nymphe Down jacket
A chain-free bike – but it is it a belting ride?
It may not twinkle like a star but it is still a diamond in the sky according to astronomers who have found a rocky planet similar to Earth but made of the precious gemstone.
A fine study of the laws of the universe interrogates what, if anything, came before the Big Bang
According to a British satellite expert and government adviser the outlandish alien imaginings of Hollywood may not be quite alien enough...
If you've ever seen large-scale deforestation, especially of the rainforest, and seen it close up when it's just happened, you feel you're in the aftermath of an armoured battle. The scale of the destruction stuns you: cleared ground which seems to be everywhere smoking, burning tree stumps flickering like huge candles. It feels as if some giant beast has torn off a great lump of the landscape and savagely consumed it, leaving bits of it bleeding behind.
Hal Hodson explains why a good heart is hard to find
David Phelan finds out that London no longer deserves to be known as the ‘Big Smoke’ – and discovers what other communities can do to follow its example
It is triangular, reflecting the three occasions that London has hosted the Games
An irreversible climate "tipping point" could occur within the next 20 years as a result of the release of huge quantities of organic carbon locked away as frozen plant matter in the vast permafrost region of the Arctic, scientists have found.