Porpoises finely adjust the size of the beams of sound they use to hunt - using sound like a searchlight to trap their prey, a study finds.
The Solar Impulse 2 plane has departed from Mandalay in Myanmar as part of its round-the-world flight, Kasia Madera reports
Parents hardly ever spot obesity in their children resulting in damaging consequences for health, doctors warn.
A law that allows councils in England and Wales to ban certain activities in public is leading to "bizarre new criminal offences", campaigners say.
Tit-for-tat claims from the Conservatives and Labour appear on front pages, as the general election campaign formally gets under way.
The BBC's Sanjoy Majumder reports from the central Indian state of Chattisgarh on the growing insecurity that is gripping the Christian community
Solar Impulse, the fuel-free aeroplane, heads out of Myanmar and on to China on leg five of its attempt to fly around the world.
Counting is under way in Nigeria's presidential election, which has been praised by the UN despite technical problems and violence.
Three days on from a massive gas blast in New York that flattened three buildings, two bodies are found in rubble.
Executives at the Dutch bank ABN Amro have renounced a €100,000 allowance after a public outcry over the extra pay.
Visually impaired cyclists Neil Fachie and Sophie Thornhill win para-cycling world sprint titles as Britain top the medals table.
Swiss firm Dufry buys a controlling stake in World Duty Free from the Benetton family, creating the world's largest travel retailer.
Jess Glynne tops the UK singles chart for the first time as a solo artist with her track Hold My Hand.
Kyle Lafferty continues his hot goalscoring streak as Northern Ireland beat Finland to boost their chances of making Euro 2016.
Steven Fletcher scores Scotland's first hat-trick for 46 years as they record an emphatic 6-1 victory over Gibraltar.
Football fans are being given the chance to vote for the BBC Women's Footballer of the Year 2015 from a five-player shortlist.
As forensics teams say they have isolated 78 strands of DNA at the Germanwings Alps crash site, more details of the plane's final moments have reportedly been leaked to German media.
Five days after the crash of Germanwings flight 4U 9525 in the French Alps, investigators say they have isolated 78 distinct DNA strands.
A family whose five-year-old daughter was raped - and whose 12-year old rapist was let off with a caution - has called on the police to re-examine the case.
Ferrari's victory in Malaysia was just what Formula 1 needed, just don't expect Fernando Alonso to agree with you.