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The European Space Agency says it will conduct no more dedicated searches for its lost comet lander, and will now wait for the probe itself to call home.

Readers offer their suggestions for a BBC doomsday sign-off after reports surface that CNN has Nearer My God to Thee set to be its musical farewell.

The precise location of the Europe's Philae comet lander continues to evade detection despite an intense imaging campaign by the Rosetta satellite.

Historian Tom Holland was one of those who tweeted Charlie Hebdo's image of Muhammad. Here he explains the ramifications of defending free speech.

Avatars and robots can now be used to help people "visit" remote locations via the internet - but this raises a host of moral and legal questions.

Police in India's Maharashtra state arrest five upper-caste members for beating, stripping and parading naked a low-caste Dalit woman.

Astronomers have been debating for years about what the star of Bethlehem might have been. What are the leading contenders?

An image has been released that shows the hairy moment that the Philae comet lander bounced back into space.

Is implantable technology the next logical step for wearables?

Drawing on extensive archival records, this digital memorial allows analysis of the ships, traders, and captives in the Atlantic slave trade. The three databases below provide details of 36,000 trans-Atlantic slave voyages, 10,000 intra-American ventures, names and personal information. You can read the introductory maps for a high-level guided explanation, view the timeline and chronology of the traffic, or watch the slave ship and slave trade animations to see the dispersal in action.

AI represents a threat to humanity, warns Stephen Hawking, but what are the risks of super-smart machines running rampant

Prof Stephen Hawking, one of the world's leading scientists, warns that artificial intelligence "could spell the end of the human race".

Hommage to Paul Otlet, a father of information science

The Alma radio telescope, one of the 21st Century's grand scientific undertakings, begins its quest to study the earliest stars.

Ben Affleck's film Argo tells how in 1980 the CIA - with Canadian help - sprang a group of Americans from Iran. But how much of it is true and how much is fiction?

What comes next for the European mission that landed a craft on a comet?

UK researchers obtain "rich" data from the Philae lander just before its power died.

The Philae lander has detected organic molecules on the surface of its comet, scientists have confirmed.

Australia cricketer Phillip Hughes dies in hospital, two days after being hit on the neck by a ball during a match in Sydney.

A post by Stuart Langridge (sil)

European Space Agency controllers will continue to listen for Philae in the days ahead, hopeful that the comet lander will somehow become active again.