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
With blue waves tumbling over them, these surfers glide underneath a tunnel of water .
A cheeky gorilla sticks her tongue out and plays up for the camera at Bronx Zoo .
SAILING peacefully across a river in the early morning light, a fisherman in China keeps a 1000 year old tradition alive .
HUDDLING under a leaf, a pair of adorable Javan scops owls take shelter from the rain .
A little brown bear cub shows his doting mum that she is always on parent duty as he uses her as a scratching post .
BLOWING bubbles underwater, this adorable polar bear slides into his tank for a playful dip .
At first glance what might look like ordinary rusty bridge and road railings, are in fact amazing works of art .
FROM COLOURFUL autumn leaves to living trees at first glance you might miss these people blended with nature .
VIBRANT bursts of colour fill the screen as beautiful flowers blossom in these time-lapse videos .
BURSTING colours of reds, pinks and purples give the illusion of a collection of stunning flowers .
PERCHING on the edge of a flower, these loved-up caterpillars can't resist each other as they enjoy a romantic moment together .
THIS alien-like bug would look more at home in outer-space but it can actually be found wriggling around here on Earth .