BBC

Animal welfare researchers measure how captive dolphins feel about their environment.

Read the experiences of the four surviving astronauts to have set foot on the lunar surface.

Read the experiences of the four surviving astronauts to have set foot on the lunar surface.

Environment Secretary Michael Gove launches a review of the country's protected landscapes.

The fourth man to walk on the Moon became an accomplished painter, finding inspiration in space.

Environment Secretary Michael Gove launches a review of the country's protected landscapes.

Red-hot rivers of lava and clouds of ash can be deadly - but death by volcano is not inevitable.

Red-hot rivers of lava and clouds of ash can be deadly - but death by volcano is not inevitable.

The fourth man to walk on the Moon became an accomplished painter, drawing inspiration from space.

The UK entrepreneur puts himself through a gruelling training programme so he can rocket to space.

The UK entrepreneur puts himself through a gruelling training programme so he can rocket to space.

State wildlife experts are seeking DNA analysis to pinpoint the mysterious creature's species.

State wildlife experts are seeking DNA analysis to pinpoint the mysterious creature's species.

Scientists uncover clues to how dinosaurs and early birds shed their skin from 125-million-year-old dandruff.

Scientists uncover clues to how dinosaurs and early birds shed their skin from 125-million-year-old dandruff.

National Geographic magazine has published some startling images of the global plastic pollution scourge.

National Geographic magazine has published some startling images of the global plastic pollution scourge.

A mid-air tug of war ensued, above San Juan Island in the US state of Washington.

A mid-air tug of war ensued, above San Juan Island in the US state of Washington.

The seal named Relashio was close to death when he was rescued.