Mars Rover: Explore the Red Planet with Nasa's robot
Image credits: Google Earth, Nasa, USGS, Esa, DLR, FU Berlin, (G. Neukum), JPL, University of Arizona
By Jonathan Amos, John Walton, George Spencer, Marina Shchukina and Salim Qurashi
Tuesday's devastating attacks in Brussels show IS's European network is still at large, despite a year of intensive efforts by security forces to close it down.
Scientists are debating whether it's possible to harness the power of gravity for interstellar space travel.
The four-year-old boy who has become the centre of a controversy between India and Pakistan - and between his father and mother.
Why, almost 60 years after he first appeared in the Daily Mirror, is a layabout lout from north-east England still so loved around the world?