At least three people have been killed and more than 100 injured, some seriously, in two explosions at the finish line of the Boston Marathon. TV footage showed bloodied runners and spectators being treated at the scene and the road strewn with debris. The FBI said that this was a "potential terrorist
SURROUNDED by a snowstorm, these young polar bears battle the elements - as well as each other .
OFFERING a glimpse into the past, a mash-up of old and new photographs show how the world’s biggest cities have changed .
A group of otters put on a show of aqua aerobics, as they raise their flippers perfectly in sync .
MEET the little lion of suburbia with a mane that makes him look like a mini-king of the jungle .
A lively lemon shark grins into the camera and showcases his impressive teeth .
THIS is the EXPLOSIVE moment when a 50 metre high pylon came crashing down to earth in a rural field .
An Indonesian farmer is dragged through muddy water as he clings to the tails of two charging cows .
This was the chaotic scene when the driver of a 4x4 vehicle became periously trapped under his vehicle for an HOUR when it overturned after a crash on a busy motorway .
What lies beneath this building site? Britain's great hope of winning the pre-WW2 arms race against Nazi Germany .
MEET the underwater British seal who is so friendly he loves to grapple divers like a friendly puppy dog .
ROLLING up snow in its tiny paws, this little squirrel is looking for a snowball fight .
LYING back in the snow, these two polar bears share a cuddle as they call time out on playtime .