Wild tiger numbers higher than previously thought

There are 40 percent more tigers in the wild than previously thought, but with a maximum of 5,578 on the prowl, they remain an endangered species, conservationists said Thursday.

Study: Climate change a major factor in South Africa floods

The fatal floods that wreaked havoc in South Africa in mid-April this year have been attributed to human-caused climate change, a rapid analysis published Friday by a team of leading international scientists said.

Moon and Mars superoxides for oxygen farming

The dusty faces of the moon and Mars conceal unseen hazards for future explorers. Areas of highly oxidizing material could be sufficiently reactive that they would produce chemical burns on astronauts' unprotected skin or ...

Climate change threatens Hadrian's Wall treasures in England

Nineteen hundred years after it was built to keep out barbarian hordes, archaeologists at Hadrian's Wall in northern England are facing a new enemy—climate change, which threatens its vast treasure trove of Roman artefacts.

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