BBC

Zoo officials shoot dead a gorilla after it grabbed a four-year-old boy who fell into its enclosure in the US city of Cincinnati.

Piecing together the bare bones of a sea reptile that swam at the time of the dinosaurs.

Alma telescope peers into space from Chile

An onboard camera has captured the successful landing of SpaceX's Falcon 9 rocket, returning from space after launching an Asian communications satellite.

Sainsbury's is trialling new food-cooling technologies that promise to be more eco-friendly than current alternatives.

Roger Harrabin visits a factory in Wales that is using ice to make fridges more economical.

US scientists produce their most precise date yet for the colossal landslide that shaped the big red canyon running through what is now Zion National Park.

Researchers invent a DNA "tape recorder" that can trace the family history of every cell in a body.

All references to climate change's impact on World Heritage sites in Australia are removed from a UN report after a government request.

The water vole has become Britain's most endangered mammal, but a project in Worcestershire is trying to reverse the decline.

A halt is called to the deployment of a new, expandable "room" on the International Space Station when it fails to open up as expected.

Stone rings thought to be created by Neanderthals have been found in France

The Royal Navy is investigating claims the wreckage of a British submarine lost during World War Two has been discovered off the coast of Sardinia.

The sun-powered aircraft Solar Impulse has landed in Lehigh Valley, Pennsylvania, after a near-17-hour flight.

HS2 is an over-priced, gold-plated project and will fail in many of its objectives a group of transport experts warns.

Shareholders at Exxon Mobil AGM reject most proposals but voted in favour of a resolution that could see a climate activist elected to the board in the future.

Researchers investigating a cave in France have identified mysterious stone rings that were probably built by Neanderthals.

The contract is signed that will lead to the construction of one of this century's key astronomical facilities - the European Extremely Large Telescope.

A possible grizzly-polar bear hybrid has been shot by a hunter in northern Canada.

Success is declared by the team drilling into the Chicxulub Crater, the deep scar made in the Earth's surface by the asteroid that hastened the end of the dinosaurs.