SURROUNDED by a snowstorm, these young polar bears battle the elements - as well as each other. The lumbering pair's sibling rivalry heats up the frosty winter setting in snow swept Alaska. American photographer and tour guide, Matthew Studebaker, 30, managed to capture these extraordinary shots in 25 miles per hour wind on Barrier Islands, Alaska in the Arctic National Wildlife Refuge. No strangers to the freezing weather, the playful polar bears sparred in temperatures of minus six degrees. "These siblings were teasing each other and sparring during a snowstorm," explains Matthew of Richfield, Ohio.
Raising his arms above his head and lying flat on his back, a polar bear stretches as he sprawls out across the ice .
A diver attempts to control rising numbers of lionfish by feeding the venomous species to Caribbean reef sharks .
Exploding out of the water, a great white shark performs a backflip during a hunt for seals .
POWERFUL bolts of lightning illuminate the night sky in an incredible autumn storm over the Sardinian coastline .
OFFERING a glimpse into the past, a mash-up of old and new photographs show how the world’s biggest cities have changed .
CLINGING onto nothing but ice, this brave climber reaches heights of 1000 FEET as he scales frozen solid waterfalls .
PERCHED on a branch, these two frogs hold hands as they look into the camera .
The dog having been pulled from the car - A police officer smashed a window in the blue Chrysler car to free the dog which was in visible distress .
VIBRANT bursts of colour fill the screen as beautiful flowers blossom in these time-lapse videos .
ARM extended and head flung back, this little chipmunk performs a loose-limbed yoga move .