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
PERCHING on the edge of a flower, these loved-up caterpillars can't resist each other as they enjoy a romantic moment together .
A curious red squirrel takes a break from collecting nuts and tries her hand at photography .
This is the amazing moment two white-tailed kites take an in-flight meal - exchanging prey at 100 foot high in mid air .
SQUABBLING over the last piece of grain, these hungry squirrels are determined to stock up on as much food as possible .
Destroyed buildings and overturned cars are seen after a huge tornado struck Moore, Oklahoma, near Oklahoma City, May 20, 2013 .
Beautiful turquoise waves rise and fall in a series of stunning images taken along the coastline of south-eastern Australia .
WITH A STERN look of determination on their faces, these adorable pooches perfect their doggy paddle as they dive head first into a swimming pool .
NEW DELHI, A woman activist of India's main opposition Bharatiya Janata Party crosses a police barricade near the residence of ruling Congress party chief Sonia Gandhi during a protest against the recent rape of a five-year-old girl in New Delhi, India, April 21, 2013 .
DIVING down at a speed of 75mph, this is the moment a hungry osprey caught his prey .
Exploding out of the water, a great white shark performs a backflip during a hunt for seals .
CAUSING a splash, this determined kingfisher goes hunting for dinner .
AN ADORABLE one-eyed kitten has been dubbed the 'pirate cat' because of his pirate-like facial expressions .