Scientists have been using an ancient Greek fable written by Aesop as inspiration to test whether birds and small children understand cause and effect relationships. A group of scientists have now extended this body of work to study raccoon intelligence. Their research uses the Aesop's Fable paradigm to assess if mammalian carnivores understand the principles of water displacement.
For the first time, researchers are able to prove that there is an optimal speed for certain insects when they fly. At this speed, they are the most efficient and consume the least amount of energy. Corresponding phenomena have previously been demonstrated in birds, but never among insects.
Sharks and rays live a lot longer than we thought -- some twice as long as previously estimated.