The UK's chief scientist says the oceans face a serious and growing risk from man-made carbon emissions.
The EU agrees what it calls "the world's most ambitious" deal to cut greenhouse gas emissions by at least 40% by 2030, overcoming deep divisions.
Google executive Alan Eustace breaks the world altitude record for a parachute jump set two years ago by Felix Baumgartner.
Surgeons in Australia say they have performed the first heart transplant using a "dead heart".
The European Space Agency releases a short sci-fi movie to promote its audacious bid to land on a comet next month.
Skywatchers in North America are treated to the final eclipse of the year.
Campaigners start legal action to prevent the government from capturing a family of wild beavers.
Small tags stuck to the undersides of baby loggerhead turtles are used to follow the animals' frenetic first hours.
The extinction of the biggest shark known to science may have triggered whales to grow to their current hefty sizes, a study suggests.
Farmland birds are at their lowest levels since records began, according to government figures.
DNA analysis of a 45,000-year-old human has helped scientists pinpoint when our ancestors interbred with Neanderthals.
Why are baby animals so cute?
Piers Linney reveals how code changed our world
Can science explain the flocking habits of starlings?
Stags, starlings and more turn out for Autumnwatch
Egyptian hieroglyphs seen in a new light
Australian photographer explores Greenland's ice sheet
Two very different paths to smarter cities
Footage reveals wild chimps on night-time crop raids
From Science And Environment
Monster shark 'kept whales in check'
Mystery of giant arm dinosaur solved
Slumbering lions win top photo prize
Hobbit find rewriting human history
Sex emerged in ancient Scottish lake