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
DIPPING his head into the vase of water, this little squirrel takes a refreshing break from an afternoon of eating .
With blue waves tumbling over them, these surfers glide underneath a tunnel of water .
This cheeky macaque gets up close and personal as he examines the dental hygiene of his fellow primate .
FLOATING effortlessly on his back, this little otter laps up a rare glimmer of English spring sunshine .
BALANCING 30 metres above ground, these slackliners take the expression of living dangerously one step further, by tightrope walking NAKED .
STRETCHING his little legs in the air, a smiley leaf-tailed gecko breaks free from his old, scaly skin .
SEA LIFE and greenery in one shot show nature at its very best .
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 .
With the vivid red smoke billowing into the sky amid the misty sand dunes, these are the blissful views provided at the break of dawn at a volcano .
GETTING behind the camera, this monkey practices his photography skills on his friends .
Gigantic 100ft waves create the perfect playground for dare-devil surfers from across the world .