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The Economist
The Economist
1 Jul 2024


NextImg:A new bionic leg can be controlled by the brain alone
Science and technology | Best foot forward

A new bionic leg can be controlled by the brain alone

Those using the prosthetic can walk as fast as those with intact lower limbs

BEFORE HUGH Herr became a professor at the Massachusetts Institute of Technology (MIT), he was a promising rock climber. But after being trapped in a blizzard during a climb at age 17, he lost both his legs below the knee to frostbite. Since then he has worked on creating prosthetic legs that would work and feel like the real thing. He appears to have succeeded.

In an article published on July 1st in Nature Medicine, Dr Herr and his team at MIT describe seven people with below-the-knee amputations who can now walk normally with the help of surgery and new robotic prostheses. For the first time, Dr Herr says, people have been able to walk with bionic legs—mechanical prostheses that mimic their biological counterparts—that can be fully controlled by their brains.

How the last mammoths went extinct

Small genetic mutations accumulated through inbreeding may have made them vulnerable to disease

The race to prevent satellite Armageddon

Fears of a Russian nuclear weapon in orbit are inspiring new protective tech



How the last mammoths went extinct

Small genetic mutations accumulated through inbreeding may have made them vulnerable to disease

The race to prevent satellite Armageddon

Fears of a Russian nuclear weapon in orbit are inspiring new protective tech



A deadly new strain of mpox is raising alarm

Health officials warn it could soon spread beyond the Democratic Republic of Congo

What The Economist thought about solar power

A look back through our archives: sometimes prescient, sometimes not