Unlike humans, hummingbirds are equally good at extracting energy from fructose as from glucose. They are marvels of evolutionary engineering. That makes perfect evolutionary sense.
Scientists presume to speak with confidence about the origin of the universe and billions of years, but have been clueless about some everyday things close to home in the present.
A well-preserved complete skull from Dmanisi, Georgia, has ignited a firestorm, threatening to declassify various claimed species of Homo into one, Homo erectus.