Herr and another climber, Jeff Batzer, embarked on a climbing expedition in January 1982. They were ascending New Hampshire’s Mount Washington and had to negotiate difficult terrain. Soon, they were caught in a snow blizzard in Huntington Ravine and had to descend into the Great Gulf where they spent three nights in-29 degrees. They stayed alive and kept warm by hugging each other. On the fourth day, a rescue team spotted them but both of them had already suffered bad frostbite and hypothermia. Both of his legs had to be amputated from below the knee while Batzer lost the fingers of his right hand, his lower left leg, and the toes of his right foot.
Herr picked himself up and started studying. He completed a postdoctoral fellowship at MIT in biomedical devices and subsequently started working on developing high-end leg prostheses and orthoses, i.e. devices emulating the human leg’s functionality. He became the director of MIT Media Lab’s Biomechatronics Group. The prosthetic limbs designed by Herr and his team resemble biological limbs. The team also creates prosthetic feet with highly durable stiff toes and titanium-spiked feet. These prosthetic limbs assist in climbing steep ice walls, standing on small rock edges, altering one’s height to avoid awkward body positions, grabbing hands and footholds previously difficult to reach, and more.
These limbs help below-the-knee amputees to take part in various activities like running, walking, climbing mountains, and more. Herr’s laboratory also creates bionic foot-and-ankle prosthetic devices and artificial knees that can be used by those with above-the-knee amputations such as war veterans.
Herr can now climb mountains even better than he could before his accident! He is known as the first person who is a double amputee to take part in a sport and compete with able-bodied, elite sportspersons.