Aug 3, 2017

Ancient asteroid collisions may not have shaped planets

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

#MeToo gets Weinstein

A man carries out Weinstein's walker. Photo: Johannes Eisele/AFP/Getty Images

Hollywood titan Harvey Weinstein is now a convicted rapist, two years and four months after accusations against him helped ignite the #MeToo movement.

Why it matters: To date, #MeToo has resulted in hundreds of powerful men losing their jobs. Seven have been criminally convicted, with four others still facing charges.

JPMorgan Chase to pull support for some fossil fuels

Illustration: Sarah Grillo/Axios

JPMorgan Chase said Monday that it won’t directly finance new oil and gas development in the Arctic and will significantly curtail its financing of the extraction and burning of coal.

Why it matters: JPMorgan is the world’s largest funder of fossil-fuel companies, according to a report by the Rainforest Action Network (RAN). The announcement follows similar moves by other big banks and investment firms, including Goldman Sachs and BlackRock.