Dylan Neri

Now imagine a white hole – a black hole’s time-reversed twin…

Just as you can enter a black hole without leaving it, you can exit a white hole without entering it – but first you must understand what black holes really are

Carlo Rovelli. [Stefania D’Allessandro / Getty Images] 
issue 28 October 2023

There are many ways to measure the course of human history and each will give an insight into one or more of the various qualities that have made us the most successful great ape. Every major advance, whether in war or art or literature, requires imagination, that most amazing of human capacities, and the ability to ask ‘What if?’ – to take the world from a different perspective.

Nowhere is this more apparent than in the history of science. While there is an inherent provincialism in revolutions in art and literature, progress in science is universal, and moves, like Dante’s Hell, in concentric circles of ever deeper understanding. It is the story of human imagination; the progressive casting off of the chains of ignorance, freeing us from our lowly origins and guiding us to Paradise.

Perhaps the greatest revision in our understanding of the universe was Einstein’s discovery that time is just as relative as anything else; and that there should exist points in space with zero volume and infinite density, where time freezes and space stretches out to infinity – black holes.

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