Add Yahoo as a preferred source to see more of our stories on Google. Sperm motility refers to the ability of sperm to move or "swim." It is one of the factors tested in a semen analysis. Learn why it ...

These whip-like organelles help protect humans from disorders like hydrocephaly and epilepsy, but scientists are puzzled by their structure. Through an NIH-funded research project, Brian Bayless hopes ...

Gene expression patterns in the inner ear put an old question about structures called kinocilia back in motion.