Brief account of the discovery of an Australopithecus hand from the Sterkfontein cave. From BBC News OnLine. The article itself can be downloaded in .pdf format from the South African Journal of Science web site. December 15, 1999. How some birds evolved blue skin .
Some birds have blue feathers.
This color is always achieved by interference of light waves, set up by a very sophisticated structure built into the feathers. From the Nature science update site, December 15, 1999. December 15, 1999. Mayflies and ancient atmospheres . Modern mayflies look just the same as ancient mayflies.