In the shadows of Python Cave, Uganda, a leopard leaps from a guano mound—formed by bat excrement—and sinks its teeth into a ...

Human evolution pictures. Image 1 of 4 (Image credit: JUSTIN TALLIS via Getty Images) Most human ancestors were dark-skinned. A 10,000-year-old skull found in Britain and known as "Cheddar Man ...

The measles virus, the mumps virus, and the various influenzas are gone. Vast reductions of human misery and death. HIV is gone, and so the AIDS catastrophe never happened.

A deadly cousin of Ebola, Marburg virus can kill between a quarter and 90 per cent of the people it infects. International travel has taken it from Africa to Europe twice in the past 40 years.

Human convalescent serum: Virus neutralization – – – Questionable: Used in only a few secondary human cases, which are normally less severe [26,80,104] IgG from equine antiserum: Virus ...