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
EAGERLY BITING his nails, this little squirrel is clearly nervous of looming predators as he searches for his meal .
BALANCING on top of a tree, this bear cub puts her climbing skills to the test .
Jostling their quills into the noses of some unlucky cubs, this is the moment two feisty porcupines ALMOST defeat a pride of seven lions .
ALL IS not as it seems in these deceptive cityscapes .
FLOATING effortlessly on his back, this little otter laps up a rare glimmer of English spring sunshine .
A SPECTRUM of colours fills the sky during this spectacular and natural display of light .
SITTING quietly at the edge of the lake, these two baby bears watch and learn as the adults hunt for fish .
Clinging on to their furry backs, mischievous monkeys appeared to enjoy the free transport as they rode around on a perturbed Capybara .
SHOWING off her best assets for the camera, this cheeky orangutan is in the mood for love, puckering up her lips to blow the biggest kiss she can .
15-foot-long great white sharks on the hunt, in False Bay, South Africa - SHOCK and awe pictures of 15-foot-long great whites on the hunt will leave you stunned .
WIDE EYED and staring straight down the lens of the camera, this intrigued seal is ready for his close up .
