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Astronomy

This moon-sized white dwarf is the smallest ever found

A newfound white dwarf is the smallest and perhaps the most massive known, and spins around once every seven minutes.

Health & Medicine

A malaria vaccine with live parasites shows promise in a small trial

After taking anti-malarial drugs after each vaccine dose to clear the parasite from the body, volunteers appeared well-protected from infection.

Humans

Ancient human bones reveal the oldest known strain of the plague

The earliest known plague strain emerged about 7,100 years ago and was less contagious as the one behind Black Death — but was still deadly.