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Electric Eel, Electrophorus electricus, Venezuela. Photo: Reinhard Dirscherl / ullstein bild / Getty Images

Researchers are trying to find a safe, non-toxic way to power electric implants like pacemakers by looking at electric eels, according to Nature. Why it matters: If the prototype can be successfully developed, it could be safer for the body because it wouldn't be as potentially toxic as traditional batteries, and could eventually run on bodily fluids, per Nature. It's also flexible, transparent, and runs on a solution of salt and water.How it works: The fish (which are not true eels) have specialized cells electrocytes all along the length of their bodies. They change the electrocyte's conductivity varying the salt and mineral concentrations in the cells. This causes the cells to create a flow of charge-carrying ions, producing electricity. Each cell only produces a small charge, but stacked together they can produce up to 600 volts of electricity to locate and stun prey.

Thomas Schroeder, a chemical engineer at the University of Michigan, and his team made similar models of electrocytes using four different hydrogels made of polyacrylamide and water. They combined 2,500 units to produce 110 volts -- enough to potentially power "ultra-low-power devices, including some cardiac pacemakers," per Nature.

Go deeper

Gaming CEO calls on industry to help fight climate change

"Catalyst Black." Screenshot: Super Evil Megacorp

Gaming CEO Kristian Segerstrale is calling on leaders in his industry to take action on climate change, after completing a $1.4 million fundraising campaign this summer.

Why it matters: Gaming's pandemic-fueled boom creates an opportunity, and maybe even an obligation, to do some good.

3 hours ago - World

U.S. releases updated vaccination, testing rules for foreign travelers

Photo: Patrick T. Fallon/AFP via Getty Images

Foreign travelers will be allowed entry to the U.S. beginning Nov. 8 if they can provide proof of full COVID-19 vaccination with a shot authorized by the World Health Organization and a negative test within three days of departure, the White House announced Monday.

Why it matters: The updated guidance, which exempts children under the age of 18 from the vaccine requirement, is intended to provide further clarity for airlines and foreign nationals who have been restricted from traveling to the U.S. since early 2020.

4 hours ago - Sports

Unvaccinated athletes face 21-day quarantine at Beijing Olympics

Logos for the 2022 Winter Olympics at Yanqing Ice Festival in February 2021 in Beijing. Photo: Lintao Zhang/Getty Images)

Athletes, staff members and journalists at the 2022 Beijing Olympic and Paralympic Winter Games who have not been vaccinated against the coronavirus will be required to quarantine for three weeks, the International Olympic Committee (IOC) outlined in its newly-published "playbooks."

Why it matters: The quarantine period is longer than the Games themselves, meaning vaccinations or an earlier arrival date will be required to participate in or cover the Games.