New Sex Chromosomes Created After Decades Long Experiment Hybrid swordtail fish may reveal secrets about how new chromosomes and species form

Sexually reproducing animals have their sex determined through many mechanisms. Sex in reptiles such as alligators is determined by egg temperature during incubation. Some species, like the clownfish, can be hermaphroditic, shifting from one gender to another depending on the environmental READ MORE

New understanding of an ancient man and his tools The remains of an incredibly well-preserved man and his toolbox taught scientists that specialized labor and trade have been around for thousands of years.

During the last days of the summer of 1991, tourists hiking in the Ötztal Alps near the Italy – Austria border found the remains of an incredibly well-preserved man. This man, dubbed Ötzi, was dated back to the “Copper Age”: READ MORE