While these theories may appear reasonable, given the complexity of the behavior it is unclear how a Darwinian process can be a plausible explanation.
For an animal whose brain is the size of a pinhead, one would think its capabilities would be hopelessly limited. Not so.
For years people cited the wiring of the vertebrate eye as evidence of “poor design” in biology.
A major thrust of neuroscience has been the use of fMRI to correlate brain activity with thinking and to draw conclusions about the physical basis of the mind.
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.