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A white hole is a theoretical solution to Einstein's field equations - a region which cannot be entered at all from the outside. In a sense, therefore, they are the time-reversed opposites of black holes. The theory suggests that a black hole is connected to a white hole via a tunnel called an Einstein-Rosen bridge (wormhole). Matter falls into the black hole and is expelled via the white one. Some theorists even argue that the Big Bang itself is a white hole, gushing out matter and creating a new universe while, on the other end, invisible and unreachable, is a black hole in a totally different universe.

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White Holes review: Extreme physics from Carlo Rovelli

We all know about black holes – we've even seen a picture of one. But white holes? In his latest book, theoretical physicist Carlo Rovelli weaves a poetic spell to persuade us that these mysterious entities are real

Culture

Image of the Moon captured by the Galileo spacecraft

Space

The moon is 40 million years older than we thought it was

News

Two beguiling books show how mathematics is revolutionising our lives

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Two beguiling books show how mathematics is revolutionising our lives

Culture

2G6HE5R ANNIE JUMP CANNON (1863-1941) American astronomer and suffragist. about 1920

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Her Space, Her Time review: Trailblazing women astronomers

Culture

2KJXNKB Leipzig, Germany. 25th Nov, 2022. Participants of a demonstration of the trade union Verdi walk with flags and carry a banner with the inscription

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Blood in the Machine review: Going back to the Luddites

Culture

Close-up Happy Asian girl influencer wear headphone with guitar record podcast onair online live streaming talk follower comment and audience on phone at home studio. Female podcaster, Audio podcast.

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Extremely Online review: A vital look at the creator economy

Culture

HNCH05 January 1, 1984 - ......Nineteen Eighty-four - 007..Film and Television. (Credit Image: ? Moviestore/Entertainment Pictures via ZUMA Press)

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Julia review: A brilliant, devastating sequel to Nineteen Eighty-Four

Culture

Author Sy Montgomery with illustrator Matt Patterson

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Of Time and Turtles review: What can we learn from turtles?

Culture

Sam Bankman-Fried

Technology

Going Infinite review: Who is Sam Bankman-Fried?

Culture

Space

Slicing the moon in half would be disastrous for Earth – but beautiful

The moon can be a scourge for astronomers, so the Dead Planets Society has figured out how to destroy it, with consequences both disastrous and visually stunning

News

Comment

Your Face Belongs to Us review: What is happening to public privacy?

Culture

Comment

The Beast review: Is AI the beast in a powerful tale about emotions?

Culture

Space

Why the next solar eclipses are a unique chance to understand the sun

Features

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Still Up review: Insomnia rom com is worth staying up for

Culture