NASA/JPL-Caltech via AP

Scientists have discovered evidence that indicates the planets in our solar system formed suddenly in collapses of dense dust rather than slow, incremental buildups of rock via asteroid collisions, per New Scientist.

The reasoning: Researchers tracked 17 asteroids over 4 billion years old in the inner asteroid belt, finding that their sizes range from 35 to 100 kilometers across. If planets had formed incrementally, ancient asteroids would have had to be much smaller in size, lending more credence to the theory that planetary formation was sudden and catastrophic.

Why it matters: These findings lead scientists to believe that there's a serious chance that planets form through the same massive dust collapses everywhere in the universe.

Go deeper

Updated 2 hours ago - Politics & Policy

Coronavirus dashboard

Illustration: Annelise Capossela/Axios

  1. Global: Total confirmed cases as of 12:30 a.m. ET: 20,620,847 — Total deaths: 748,416— Total recoveries: 12,770,718Map.
  2. U.S.: Total confirmed cases as of 12:30 a.m. ET: 5,197,000 — Total deaths: 166,026 — Total recoveries: 1,714,960 — Total tests: 63,252,257Map.
  3. Politics: Pelosi says Mnuchin told her White House is "not budging" on stimulus position.
  4. Business: U.S. already feeling effects of ending unemployment benefits.
  5. Public health: America's two-sided COVID-19 response America is flying blind on its coronavirus response.
  6. Education: New Jersey governor allows schools to reopenGallup: America's confidence in public school system jumps to highest level since 2004.

Bob Woodward's new book details letters between Trump and Kim Jong-un

Bob Woodward during a 2019 event in Los Angele. Photo: Michael Kovac/Getty Images

Journalist Bob Woodward has obtained "25 personal letters exchanged" between President Trump and North Korean leader Kim Jong-un for his new book, "Rage," publisher Simon & Schuster revealed on Wednesday.

Details: In the letters, "Kim describes the bond between the two leaders as out of a 'fantasy film,' as the two leaders engage in an extraordinary diplomatic minuet," according to a description of the book posted on Amazon.

Dozens of Confederate symbols removed in wake of George Floyd's death

A statue of Confederate States President Jefferson Davis lies on the street after protesters pulled it down in Richmond, Virginia, in June. Photo: Parker Michels-Boyce/AFP via Getty Images

59 Confederate symbols have been removed, relocated or renamed since anti-racism protests began over George Floyd's death, a new Southern Poverty Law Center (SPLC) report finds.

Why it matters: That's a marked increase on previous years, per the report, which points out just 16 Confederate monuments were affected in 2019.