Apr 5, 2017

This "fish" is the future of robots

Li et al. 2017;3:e1602045

Inspired by a manta ray, scientists have built a small, squishy robotic fish that can swim and turn by remote control. Using the surrounding water as an electrode to capture and distribute electrical energy, the self-powered machine treads water twice as fast as similar robots and can function in a range of water temperatures. The biggest advance, though, is its energy efficiency — the robot can operate for three hours without recharging.

"[It] is an elegant demonstration of the emerging capabilities of soft robots," says Harvard's Michael Wehner, who last year built an octopus robot powered by hydrogen peroxide.

Why it matters: Robots will soon move out of warehouses and hospitals and into harsher, less predictable environments where they'll have to navigate small spaces and interact with humans (they may eventually even move through our bodies to diagnose disease in a next generation of endoscopies). To make it, they'll need to be compact, soft and flexible.

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World coronavirus updates: Governments tighten restrictions to curb cases surge

Data: The Center for Systems Science and Engineering at Johns Hopkins, the CDC and China's Health Ministry. Note: China numbers are for the mainland only and U.S. numbers include repatriated citizens and confirmed plus presumptive cases from the CDC

Japan's Prime Minister Shinzo Abe announced plans to declare a state of emergency and a 108 trillion yen ($990 billion) stimulus package Tuesday, as several governments announced new restrictions amid a jump in cases.

The big picture: The virus is confirmed to have killed almost 75,000 people and infected 1.3 million globally as of early Tuesday, per Johns Hopkins data. Spain has reported the most cases outside the U.S. (more than 136,000) and Italy the most deaths (over 16,000) as half the planet's population is now on lockdown.

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Boris Johnson in intensive care as coronavirus symptoms worsen

Photo: Peter Summers/Getty Images

U.K. Prime Minister Boris Johnson is being treated in the intensive care unit of St. Thomas' Hospital in London due to increasingly severe coronavirus symptoms.

What they're saying: Cabinet minister Michael Gove told LBC radio on Tuesday morning Johnson was not on a ventilator. "The prime minister has received some oxygen support and he is kept under, of course, close supervision," he said.

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Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 3 a.m. ET: 1,348,184— Total deaths: 74,834 — Total recoveries: 284,802Map.
  2. U.S.: Total confirmed cases as of 3 a.m. ET: 368,376 — Total deaths: 10,989 — Total recoveries: 19,828Map.
  3. Trump administration latest: President Trump's economic adviser Peter Navarro warned White House colleagues in late January the coronavirus could take over half a million American lives and cost close to $6 trillion, memos obtained by Axios show.
  4. 2020 update: Wisconsin Supreme Court blocks governor's attempt to delay in-person primary voting delayed until June.
  5. States latest: West Coast states send ventilators to New York and other states with more immediate need — Data suggest coronavirus curve may be flattening in New York, Gov. Andrew Cuomo said.
  6. World update: U.K. Prime Minister Boris Johnson moved to intensive care as coronavirus symptoms worsen.
  7. Stocks latest: The S&P 500 closed up 7% on Monday, while the Dow rose more than 1,500 points.
  8. What should I do? Pets, moving and personal health. Answers about the virus from Axios expertsWhat to know about social distancingQ&A: Minimizing your coronavirus risk.
  9. Other resources: CDC on how to avoid the virus, what to do if you get it.

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