Why the early universe did not collapse into a black hole

Expansion kept the early universe from becoming a black hole

The early universe was extremely dense, but it was also expanding very quickly. That expansion kept gravity from making the whole universe collapse into a black hole despite its enormous density.

A famously tough bacterium survived three years in space

3 years

The bacterium Deinococcus radiodurans survived for three years while exposed to outer space. The result supports the possibility that some Earth microbes could survive at least part of a journey through space.

Falling groundwater may expose Boston’s wooden foundations

Many older Boston buildings rest on wooden piles driven into fill. The piles stay sound when underwater, but prolonged exposure to air can cause dry rot. Groundwater is falling in many parts of the city, partly because rainwater is sent into sewers instead of soaking into the ground.

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Why the early universe did not collapse into a black hole

Expansion kept the early universe from becoming a black hole

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