The mystery of why homing pigeons get lost when released from a particular location in the US may have been solved.

Could stress be good for you?

How do you bring a language back from the dead?

Photographer Joel Meyerowitz on the stories behind his images

A fitness device created by Glasgow academics and designers helps stroke patients during their long road to recovery.

How do you give a polar bear a 'medical'?

Wounded former Representative Gabrielle Giffords and the head of the National Rifle Association testify at a congressional hearing on gun control.

AC Milan football fans clash with Italian police as they celebrate a proposed transfer of striker Mario Balotelli from Manchester City.

Survivors of the Battle of Stalingrad have been talking to the BBC's Daniel Sandford ahead of the 70th anniversary of the end of the battle.

Real Madrid come from behind to draw the first leg of their Copa del Rey semi-final with Barcelona at the Bernabeu.

Facebook reports a sharp drop in profits, partly due to increased spending on research and development.

Arsenal score twice in three second-half minutes to come from behind and earn a draw with Liverpool at the Emirates.

Researchers propose a new way to measure the masses of the biggest black holes, aiding in our understanding of how they evolve along with galaxies.

David Cameron lands in Algeria for the first high-level visit since militants attacked a gas facility and killed 38 people.

An Ohio judge rules that the rape trial of two high school football players will take place in the county where the alleged attack happened.

Colombia's rebel group Farc says it intends to carry on capturing military personnel, despite warnings that it could undermine peace talks.

The Federal Reserve confirms it will keep interest rates at near-zero at least until the US jobless rate falls below 6.5%.

Lance Armstrong claims that his life ban from sport makes him a 'fall guy' for a century of cheating in the Tour de France.

Togo draw 1-1 with Tunisia in an incident-filled match in Nelspruit to reach the last eight of the Africa Cup of Nations.

Israeli jets attack a convoy on the Syria-Lebanon border, unconfirmed reports say, amid fears that Syrian weaponry might fall into the hands of militants.