Pecking Away at Beak Evolution By Elizabeth PennisiSep. 2, 2004 Bonemaking protein tied to beak diversity in Darwin's finches
Evolving Ears as Whales Got Wet By Erik StokstadAug. 12, 2004 Fossils show how ears adapted when the mammals left land behind
Catching Fish Evolving By Menno SchilthuizenAug. 2, 2004 Biologists watch an African fish species speeding toward a split
The Fluttering Nature of Songbird Evolution By Jay WithgottJul. 15, 2004 Rise of new species may produce more diversity than slow, steady evolution within species
The Eyespots Have It By Henry NichollsJul. 12, 2004 Timing of gene expression generates the variety of patterns on butterfly wings
Heehaw History By Elizabeth PennisiJun. 17, 2004 Genetic study finds that humans have twice domesticated donkeys
Sex Gets Algae Through Hard Times By Elizabeth PennisiJun. 15, 2004 Biologists find hints that sex evolved to counter environmental stress
Recipe for Shell Evolution By Katie GreeneJun. 1, 2004 A dose of calcium may have diversified Cambrian life
Mitochondrial DNA Mixes It Up By Mary BeckmanMay. 14, 2004 Evidence of DNA swapping may break the molecular clock
Frogs Not Croaking Quite Yet By Rebecca RennerMay. 12, 2004 Fast adaptation means some frogs can take the heat
Ancient Hummingbirds Were European By Erik StokstadMay. 6, 2004 Unexpected Fossil Creates a Buzz About Hummingbird Origins
Long-Horned Lizards Live Longer By Mary BeckmanApr. 2, 2004 In fighting a ruthless predator, lizards reveal natural selection in action
Faced With Flowers, Ferns Flourished By Rachel EhrenbergMar. 31, 2004 The advent of angiosperms didn't stunt fern evolution after all
Weak Jaw, Big Brain By Elizabeth PennisiMar. 24, 2004 A mutated muscle protein may have allowed human ancestors to expand their brains
No Neandertals in the Gene Pool By Deborah HillMar. 16, 2004 DNA analysis suggests female Neandertals rarely bred with early humans