A tiny head carved from mammoth ivory looks back at us from the Stone Age. This sculpture, discovered at the archaeological ...

Researchers say they have discovered an entirely new class of life inside the human body, and it is very similar to a virus.

Researchers have extracted ancient proteins from australopithecine fossils and determined whether they were male or female — ...

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Click here for instructions on opening this form. To document treatment of certain nonimmigrants for an emergency medical condition and the dates of the treatment. To obtain the person's permission to ...