In pterosaurs a greatly elongated fourth finger of each forelimb supported a winglike membrane. The other fingers were short and reptilian, with sharpclaws.
Gripping the ice with his sharpclaws, the polar bear leaned over the edge of the ice, sniffing the air and taking in the foreign scent of the 50 sweaty, sunburnt tourists, expedition leaders and crew.
The 12ft long creature, similar to the Velociraptor created for the film Jurassic Park, was equipped with murderous claws, razor sharp teeth and unusually long hindlegs.