Clipsheet

“This is a short-lived nuclide that only exists in the early solar system,” says Noriko Kita, an expert in meteorite aging from the University of Wisconsin-Madison. That advanced vintage makes chondrules the second-oldest recognizable objects in our solar system, after calcium-aluminum-rich inclusions (CAIs), specks of white in meteorites that are thought to have formed one to three million years earlier by condensing out of the gas that surrounded our young sun.

As President-elect Joe Biden continues his transition to the White House, House Democratic progressives and centrists are fighting over how to frame the party’s agenda for the public. For instance, progressive Rep. Rashida Tlaib (D-Mich.) said “I can’t be silent” and will continue speaking about policy goals ranging from defunding police departments to passing the Green New Deal. But centrist Democrat Rep. Abigail Spanberger (D-Va.) argues that if party members keep using such language, Democrats will get “torn apart in 2022.”

-Jianing Li, Mike Wagner, Lew Friedland, Dhavan Shah

“Baltimore never really wrestled with the demons of segregation,” said Lawrence Brown, a visiting sociology professor at the University of Wisconsin-Madison