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Jun 1, 2025  |  
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NextImg:How to build strong magnets without rare-earth metals
Science & technology | State of flux

How to build strong magnets without rare-earth metals

China’s export restrictions may boost scientific innovation

THE HUMBLE magnet may not seem to belong alongside steel, microchips and oil as a chess piece in the great diplomatic game. But on April 4th, as part of its retaliation against America’s tariffs, China announced export restrictions on a particularly useful kind of magnet—the powerful permanent sort that can be made with “rare-earth” metals.

Kawasaki’s off-road personal mobility vehicle Corleo.

Companies have plans to build robotic horses

One diminutive design is aimed at children

Illustration of a guinea pig with headphones.

Compressed music might be harmful to the ears

In guinea pigs it can weaken muscles important for hearing


Woman and her dog at Crufts dog show.

Dogs really do look and act just like their owners

The resemblance increases over time


Is your hay fever getting worse?

Climate change could be to blame

A landmark study of gender medicine is caught in an ethics row

Some say the trial is unethical. Others, that not doing it would be immoral

Rates of bowel cancer are rising among young people

Childhood exposure to a common gut bacterium could be responsible