| http://www.w3.org/ns/prov#value | - These reduce the density and viscosity of the water around the penguin???s body, cutting drag and enabling the bird to reach speeds that would otherwise be impossible. (As an added benefit, the extra speed helps the penguins avoid predators such as leopard seals.)Images below are from the November 2012 edition of National Geographic magazine, which includes an exclusive video and interactive graph
|
