Joachim Stadel / UZH

Astrophysicists from the University of Zurich in Switzerland have built the largest simulation of the universe yet. The simulation, which was described in Computational Astrophysics and Cosmology, enables scientists to see how dark matter interacts with the universe. The photo above is part of the simulation, which highlights the dark matter halos in yellow — the dark matter that hypothetically surrounds galaxies.

How big? The simulation models more than 25 billion virtual galaxies.

Why it matters: The simulation will serve as a calibrator to help the Euclid satellite gather information from the universe. The simulation with help frame what Euclid will look for in its investigation into dark matter and dark energy. The satellite is set to launch in 2020.

How to see dark matter: Scientists believe dark matter and dark energy constitute 95% of our universe — the other 5% is what we can see, but this dark matter has remained mostly a mystery. Euclid won't be able to literally see the dark matter, but it will be looking for changes in the light as it travels the Universe. The astrophysicists' simulation predicts how dark matter and dark energy operate, which helps frame the kind of dark matter effects Euclid should be looking for and measuring.

Go deeper: Read the press release with details on how the simulation was built and Euclid's goals, here.

Go deeper

Updated 2 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 12:30 a.m. ET: 18,288,573 — Total deaths: 693,805 — Total recoveries — 10,916,907Map.
  2. U.S.: Total confirmed cases as of 12:30 a.m. ET: 4,713,562 — Total deaths: 155,469 — Total recoveries: 1,513,446 — Total tests: 57,543,852Map.
  3. Education — Fauci: Schools can reopen with safeguards, but those in virus hot spots should remain closed
  4. Politics: White House will require staff to undergo randomized coronavirus testing — Pelosi says Birx "enabled" Trump on misinformation.
  5. Sports: 13 members of St. Louis Cardinals test positive, prompting MLB to cancel Tigers series — Former FDA chief says MLB outbreaks should be warning sign for schools.
  6. 1 🎥 thing: "Tenet" may be the first major film to get a global pandemic release.
Updated 3 hours ago - Science

Hurricane Isaias lashes the Carolinas

People walk through floodwaters on Ocean Blvd. in Myrtle Beach, South Carolina, on Monday. Photo: Sean Rayford/Getty Images

Hurricane Isaias made landfall as a Category 1 storm near Ocean Isle Beach in southern North Carolina at 11:10 p.m. ET Monday, packing maximum sustained winds of 85 mph, per the National Hurricane Center (NHC).

What's happening: Hurricane conditions were spreading onto the coast of eastern South Carolina and southeastern N.C., the NHC said in an 11 p.m. update. Ocean Isle Beach Mayor Debbie Smith told WECT News the eye of the storm triggered "a series of fires at homes" and "a lot of flooding." Fire authorities said they were responding to "multiple structure fires in the area."

Exclusive: Trump declines to praise John Lewis, citing inauguration snub

President Trump dismissed the legacy of the late Rep. John Lewis in an interview with “Axios on HBO,” saying only that Lewis made a “big mistake” by not coming to his inauguration.

The big picture: Trump's comments were a glaring contrast with the praise Republicans and Democrats showered upon Lewis this week, and a default to personal grudges during a week of mourning for a civil rights hero.