Many of the body's biggest flaws are the result of evolution building on old designs instead of starting over. Our spine, ...

Genes associated with male reproductive biology appear to be under relaxed selective constraint in a primate species with low sperm competition.

Protein function predictions are bioinformatic methods (i.e. involving computation using software) that aim to predict the function of a protein. Protein function analyses use protein sequences and ...

Fine-scale exogenous attention within the foveola selectively enhances contrast gain at low-to-mid spatial frequencies while increasing response gain across a broad spatial frequency range.

Elizabeth Boskey, PhD, MPH, CHES, is a social worker, adjunct lecturer, and expert writer in the field of sexually transmitted diseases. The testes make sperm and testosterone which are important for ...