Ross D. Franklin / AP

Scientists have invented a skin patch that generates power from sweat, according to New Scientist. Sweat powered a radio for two days and could eventually be used for devices to monitor medical conditions.

How it works: The patch contains enzymes that replace batteries and "feed off sweat to provide power." Joseph Wang, a member of the team from U.C. San Diego that worked on the technology, told New Scientist: "If you were out for a run, you would be able to power a mobile device."

What's next: Right now there is extensive research into flexible sensors and electronics that would allow people to continually monitor health conditions through wearable devices. Wang hopes these sensors could eventually generate "enough power for a Bluetooth connection" so results could be read off a smartphone.

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Postal slowdown threatens election breakdown

In 24 hours, signs of a pre-election postal slowdown have moved from the shadows to the spotlight, with evidence emerging all over the country that this isn't a just a potential threat, but is happening before our eyes.

Why it matters: If you're the Trump administration, and you're in charge of the federal government, remember that a Pew poll published in April found the Postal Service was viewed favorably by 91% of Americans.

Updated 1 hour ago - Politics & Policy

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Illustration: Aïda Amer/Axios

  1. Global: Total confirmed cases as of 2 p.m. ET: 21,280,608 — Total deaths: 767,422— Total recoveries: 13,290,879Map.
  2. U.S.: Total confirmed cases as of 2 p.m. ET: 5,335,398 — Total deaths: 168,903 — Total recoveries: 1,796,326 — Total tests: 65,676,624Map.
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USPS pushes election officials to pay more for mail ballots

Protesters gather in Kalorama Park in D.C. today before demonstrating outside the condo of Postmaster General Louis DeJoy. Photo: Cheriss May/Reuters

The Postal Service has urged state election officials to pay first class for mail ballots, which Senate Democratic Leader Chuck Schumer says could nearly triple the cost.

Why it matters: Senate Democrats claim that "it has been the practice of USPS to treat all election mail as First Class mail regardless of the paid class of service."