- Cosmic study 'underestimated' dust
Scientists who claimed to have found evidence for a cosmic super-expansion just after the Big Bang underestimated a key confounding factor in their research, according to a new analysis.
- Global protests over climate change
Street protests demanding urgent action on climate change attract hundreds of thousands of marchers across more than 2,000 locations worldwide.
- Molten metal batteries for the grid
Engineers have invented a battery made of three liquefied metals, which they say is efficient and cheap enough to store power on the electric grid.
- Slippery banana study wins Ig Nobel
Research that investigated why bananas are slippery when you step on them wins one of this year's Ig Nobel prizes.
- 'Artificial eye' to detect particles
The human eye has inspired physicists to create a processor that can analyse particle collisions 400 times faster than currently possible.
- Murder 'comes naturally' to chimps
A major international study finds that killings among chimpanzees result from normal competition, not human interference.
- Europeans drawn from three 'tribes'
Most present-day Europeans are a mixture of three ancient populations, according to a major study published in the journal Nature.
- Inky prints show state of hedgehogs
Hedgehogs are more thinly spread in the UK than previously believed, a study using ink pads to record their paw prints reveals.
- Nasa picks astronaut ship designs
The US space agency picks the companies it hopes can take the country's astronauts back into space - a capability lost when the shuttles retired in 2011.
- Ancient China fish 'nearly extinct'
The Chinese sturgeon, thought to have existed for more than 140 million years, is now on the brink of extinction, say local media.