Global temperatures now highest for thousands of years

The Earth's only been this warm for about a quarter of the time over the last 11,300 years, a new reconstruction of the planet's temperature history shows.

Microbial fuel cells become 50 times more efficient

Engineers say they've developed microbial fuel cells that can produce up to 50 times more electricity directly from wastewater as previous efforts.

Team finds trigger for volcanic 'super-eruptions'

'Super-eruptions' of major volcanic systems such as Yellowstone are triggered by a combination of the temperature influence and precise shape of the magma chamber, say scientists.