Mars rover finds organic compounds

NASA's confirmed rumors that the Curiosity rover has found organic compounds on Mars - but says they're probably not a sign of life, and likely came from Earth.

NASA tweaks Mars rover landing plans

NASA has decided its precision landing gear is accurate enough to let it land the Curiosity Mars rover a lot closer to its target than expected.

Nuclear accidents likely 'every ten to twenty years'

Catastrophic nuclear accidents such as the core meltdowns at Chernobyl and Fukushima are 200 times more likely to happen than previously believed, say scientists.

Fracking safe - within limits, says study

The controversial technique for shale gas production known as fracking won't contaminate water sources, say researchers - as long as there's a safe distance between the injection source and water supplies.

Tighter regulation needed for fracking, says report

Hydraulic fracturing of shale formations, or fracking, to extract natural gas doesn't cause groundwater contamination, a new report has found.