DNA testing has improved by leaps and bounds since the 1980s and has helped us track the evolution of humans over thousands, even millions, of years. It has enabled scientists to compare our ...

Objective: Meta-analysis was used to evaluate the effects of an exercise intervention on bone mineral content (BMC), bone mineral density (BMD), and bone metabolism in adolescents. Conclusion: ...

A scientific expedition to Peru has yielded a treasure trove of 27 new species, including an amphibious mouse, a "blob-headed" fish, and other zoological oddities. Ronald Diaz/Conservation ...