Even dimly lit bedrooms may stop breast cancer drugs from working, according to US research.
Star Wars actor Mark Hamill calls returning to the franchise was an "unexpected gift", and says Harrison Ford is recovering well from his broken ankle.
At least two Palestinians die and more than 200 are hurt during West Bank protests against Israel's military operation in Gaza.
The wreckage of a plane that disappeared with 116 people on board on a flight from Burkina Faso to Algiers has been found in Mali, officials say.
At least two Palestinians have been killed during a West Bank march protesting against Israel's military operation in Gaza.
The BBC's Natalia Antelava speaks to residents in the city of Donetsk in eastern Ukraine, the last stronghold of pro-Russian separatists, to gauge how the conflict is affecting their lives.
All dinosaurs were covered with feathers or had the potential to grow feathers, a study published in the journal, Science, suggests.
The US says Russia has fired artillery at Ukrainian military positions in the east, a week after the Malaysia Airlines flight MH17 disaster.
Fast-food chain McDonald's suspends sale of chicken nuggets in Hong Kong over the out of date meat scandal at a Chinese supplier.
Sub-Saharan Africa's agricultural sector needs to harvest the fruits of biotechnology in order to establish sustainable development, says a Chatham House report.
A discovery of 150 million year old fossils in Siberia indicates that feathers were much more widespread among dinosaurs than previously thought.
New research suggests that the global reduction in wildlife is connected to an increase in human trafficking and child slavery.
A Mexican federal judge charges six employees of a children's home at the heart of an abuse scandal in the city of Zamora.
Which city serves the strongest cup of coffee?
Bogus marriages have become an "industry of deceit" that is increasing at an "alarming rate", the Home Affairs select committee warns.
Why Indian PM Narendra Modi is avoiding the media
French performers march to defend state benefits
Arizona halts executions pending a review of its death penalty procedures, after the allegedly botched lethal injection of a convicted murderer.
Type 2 diabetes is more common in people who work shifts, with effects on waistlines, hormones and sleep increasing the risk, a study suggests.
US President Barack Obama urges lawmakers to end a tax loophole that allows US companies to avoid paying US corporate taxes.