Subscribe now

Mathematics

Mathematicians have discovered a mind-blowing new kind of infinity

It may sound strange, but mathematicians have created an entire ladder of infinities, each larger than the next. Now a new kind of infinity threatens to upset that order, and perhaps redefine the structure of the mathematical universe

By Alex Wilkins

6 December 2024

Infinity is more complex than you might think

Andriy Onufriyenko/Getty Images

A new kind of infinity appears to break the rules of how extremely large numbers behave, and could redraw the way the mathematical universe is ordered.

It may come as a surprise, but mathematicians have long known that there is more than one kind of infinity. In 1878, Georg Cantor first showed that the infinite set of real numbers, which includes negatives and decimals, is actually larger than the infinite set of natural, or whole, numbers. Proving this involves a careful comparison between the two sets, rather…

Sign up to our weekly newsletter

Receive a weekly dose of discovery in your inbox! We'll also keep you up to date with New Scientist events and special offers.

Sign up

To continue reading, subscribe today with our introductory offers