This makes me happy :)
Study Suggests Why Our Ancestors Switched to Bipedal Power
by PhysOrg staff
Our earliest ancestors may have started walking on two limbs instead of four in a bid to monopolise resources and to carry as much food as possible in one go, researchers have found.
A study published in the journal Current Biology this week, investigated the behaviour of modern-day chimpanzees as they competed for food resources, in an effort to understand why our “hominin”, or “human-like” ancestors became bipedal.
Its findings suggest that chimpanzees switch to moving on two limbs instead of four in situations where they need to monopolize a resource, usually because it may not occur in plentiful supply in their habitat, making it hard for them to predict when they will see it again. Standing on two legs allows them to carry much more in one go because it frees up their hands…
(read more: PhyOrg) (photo: W.C.M. McGrew)
* The full report, Chimpanzee carrying behavior and the origins of human bipedality, is available in the Mar. 20 issue of Current Biology:
Sea Cucumbers (class Holothuroidea)
Sea cucumbers can confuse or harm predators by propelling their own toxic internal organs from their anus in the direction of attack. The organs will grow back and it may save them from being eaten!