A Nasa flight analyst explains three things you need to know about going to Mars.

For decades the BBC denied job applicants were vetted by MI5 - but vetting continued at the corporation until the 1990s.

Why mixing only with people who are similar to us means we could be missing out.

Patient's lives are being saved by poo, but how far can microbial medicine go?

Brazil's Odebrecht scandal is one of the biggest corporate corruption cases in history.

What happened in Salisbury has been disputed by Russian journalists.

Rachel Barrie is a rarity in the world of Scotch whisky - a female master blender.

Shaggy, Kylie, Frank Skinner, and Ed Balls help Her Majesty celebrate at the Royal Albert Hall.

Thousands of anti-government protesters march through Yerevan after their leader is detained.

Great Britain's wait to play in the Fed Cup World Group continues after they are beaten 3-2 by Japan in their promotion play-off.

Arsene Wenger's Arsenal farewell starts in the perfect manner as the Gunners score three goals in seven minutes to ease to victory against West Ham.

A rare menu for the first meal aboard the Titanic, letters and a ticket went under the hammer.

More than 40,000 runners took part in the 26.2-mile event amid temperatures of at least 24.1C (75.3F).

The accident during race practice on a river in China may have been caused by a strong current.

Ángel Gahona is gunned down on Facebook Live while reporting on a wave of anti-government protests.

The 57 dead include five children accompanying their parents registering to vote in Kabul.

The Olympic diver says the prospect of being a father has changed his perspective on life.

Britain's David Weir wins his eighth London Marathon men's wheelchair title in a thrilling sprint finish.

Watch as David Weir wins a pulsating sprint finish to secure his eighth London Marathon wheelchair title.

Kenya's Vivian Cheruiyot wins the 2018 London Marathon but Paula Radcliffe's' mixed-gender' race world record remains intact.

Fadi al-Batsh, shot dead in Kuala Lumpur, was a member of Palestinian militant group Hamas.