Recently, a team of British paleontologists added a new pseudo-explanation.
Another study of bird migration using geolocators finds fascinating new facts about social interactions during long-distance flights.
One must separate beauty from mate choice in order to tell if animals recognize beauty.
In a physical world there will be design constraints, so it is only realistic to expect tradeoffs.
The key lies in a triple-layered structure and a protein called osteopontin.