BBC

The world's longest and deepest rail tunnel is officially opened in Switzerland, after almost two decades of construction work.

Roman tablets discovered during excavations in London include the oldest hand-written document ever found in Britain, archaeologists say.

Aurora Borealis watchers switch from using detection equipment in England to kit in Scotland after missing spectacular displays in March.

While Tim Peake has been in space he has handed out Brit Awards, run the London Marathon, and even done a spacewalk.

The world added far more renewable energy sources than fossil fuels in 2015, with developing countries overtaking richer nations on green spending.

MSPs will vote on whether to impose a full ban on fracking as part of an environment debate at Holyrood.

The world's longest, deepest rail tunnel just opened

Water found deep in the Moon was delivered when icy asteroids splashed into magma oceans 4.3 billion years ago, a study suggests.

Scientists in California are testing a spongy material made with the key ingredient of baking soda as means of capturing carbon emissions.

Wildlife authorities in Thailand are removing tigers from a controversial Buddhist temple after accusations of wildlife trafficking and animal abuse.

The director of Cincinnati zoo says he would do the same again after a gorilla, into whose enclosure a child fell, was shot dead.

A woman is feared dead after a crocodile attack in Australia's Daintree National Park.

The killing of a gorilla at a zoo in the US city of Cincinnati after a four-year-old boy fell into its enclosure triggers outrage on social media.

US researchers are testing a key ingredient of baking soda as a means of capturing carbon dioxide.

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.