An international team reasoned there had to be a purpose for sleep. In one of the largest datasets ever collected, they believe they found two functions.
Design with interdependent layers presents a challenge to neo-Darwinism. Natural selection is oblivious to anything but an immediate beneficial variation.
It turned out last week that scientists have been wrong for 350 years about how sperm swim.
It takes foresight to make complex tools and procedures that can restore the functions of other tools. A blind process can only see the immediate present.
As symbols of the perfection of human form, one might consider the Venus de Milo or Michelangelo’s David. But those don’t show the insides.