The major forms of selenium in the diet are highly bioavailable. Selenium intake varies according to geographic location, but there is no indication of average intakes below the RDA in the United ...

Physics is the search for and application of rules that can help us understand and predict the world around us. Central to physics are ideas such as energy, mass, particles and waves. Physics attempts ...

Welcome to Smithsonian Open Access, where you can download, share, and reuse millions of the Smithsonian’s images—right now, without asking. With new platforms and tools, you have easier access to ...

Indicating that Neanderthals buried their dead, a stone-lined pit in southwest France held the 70,000-year-old remains of a man wrapped in bearskin. The illustration is based on a diorama at ...