Black Death England up to half population

The Black Death may have killed half of England

The Black Death reached England in 1348. By the time the outbreak had passed, it may have killed as many as half of the people living in the country.

A planet barely heavier than Earth can be almost as big as Saturn

Kepler-51b is a remarkably low-density planet. It has only a few times Earth's mass but a radius approaching that of Saturn, giving it an enormous, diffuse atmosphere. Astronomers call such worlds 'super-puffs.' Their strange proportions show that a planet's size can reveal surprisingly little about how much matter it contains.

Jumping spiders use fluid pressure to extend their legs

A jumping spider can straighten its legs for a powerful leap by forcing body fluid into them under pressure. This lets it jump without needing large muscles to extend those leg joints.

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Black Death England up to half population

The Black Death may have killed half of England

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