Chris O'Meara / AP

Researchers engineered a solar cell that worked for 10,000 hours without its performance being compromised, according to a new study.

Why it matters: The solar energy industry has been intensely focused on perovskite solar cells that cost less to produce compared to silicon-based ones. Perovskite cells could potentially disrupt the industry but have been hampered by the fact that they can rapidly degrade with wear and tear from water and UV light.

The next step: The efficiency of the new solar cell was low — only up to 12.7%. If the stability can be achieved with previously demonstrated efficiencies for perovskite cells (upwards of 22% and on par with silicon solar cells), the price of solar energy might even compete with fossil fuels.

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Updated 18 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Eniola Odetunde/Axios

  1. Global: Total confirmed cases as of 5 p.m. ET: 11,520,461 — Total deaths: 535,499 — Total recoveries — 6,231,052Map.
  2. U.S.: Total confirmed cases as of 5 p.m. ET: 2,911,888 — Total deaths: 130,101 — Total recoveries: 906,763 — Total tested: 35,515,075Map.
  3. Public health: Case growth outpacing testing in hotspots.
  4. States: West Virginia becomes latest state to mandate facial coverings in public.
  5. Politics: Cuomo accuses Trump of "enabling" the coronavirus surge — Sen. Chuck Grassley opts out of attending GOP convention over coronavirus concerns.

Trump ramps up culture war attacks

Photo: Tasos Katopodis/Getty Images

President Trump's attacks are spreading to sports that are cornerstones of rural, conservative white American life.

Why it matters: The culture war that engulfed the NBA and NFL is reaching other major leagues, with teams that stonewalled activists for years suddenly showing a willingness to listen.

Foreign students could be forced to leave U.S. if colleges move online

Harvard University campus in April 2020. Photo: Maddie Meyer/Getty Images

Foreign college students could be forced to leave the U.S. or transfer schools if their universities move classes entirely online this fall, according to guidance released by Immigration and Customs Enforcement (ICE) on Monday.

Why it matters: Several U.S. colleges and universities — most recently Harvard — have announced plans to move most or all courses online this fall due to coronavirus concerns. Many institutions rely heavily on tuition from international students.