Surgeon Bartley Griffith examines the pig heart before the transplant.

Why Did the First Human Patient to Receive a Pig Heart Transplant Die?

Scientists have come up with at least four explanations

As of June 15, the World Health Organization had recorded a total of 2,103 confirmed monkeypox cases in 42 countries. Pictured: a colorized transmission electron micrograph of monkeypox virus particles (green) cultivated and purified from cell culture

History of Now

What You Need to Know About the History of Monkeypox

Mired in misconception, the poxvirus is endemic in certain African countries but was rarely reported in Europe and the U.S. until recently

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