Peter Larson

Did the Tyrannosaurus rex have feathers, as some scientists have wondered in recent years? No, says a new study. Unlike some of its feathered ancestors, the T. rex was covered in scales.

The discovery: Scientists found fossilized, scaly skin on the T. rex and other tyrannosaur species in North America and Asia, a strong challenge to the idea that T. rex w was covered in feathers like some of its ancestors. "(This) shows without question that T. rex had scaly skin," Phil Bell, a paleontologist at Australia's University of New England, told The Washington Post.

One big question: If its ancestors had feathers, why did the T. rex evolve with scales as it became Earth's apex predator 70 million years ago? The researchers propose it may have been the dinosaurs' large size: bigger bodies can more easily maintain a constant body temperature and feathers could have trapped unwanted heat.

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Opposition leader Leopoldo López flees Venezuela

Venezuelan opposition politician Leopoldo López outside the Spanish embassy in Caracas, in 2019. Photo: Juan Barreto/AFP via Getty Images

Leopoldo López, a former political prisoner and prominent Venezuelan opposition leader, has left the country, his Popular Will party confirmed in a statement Saturday.

Why it matters: He's been an influential force in the push to oust President Nicolás Maduro's regime and a mentor to opposition leader Juan Guaidó. He'd been in the Spanish ambassador's Caracas residence since escaping house arrest in April 2019 following a failed military uprising.

Obama: The rest of us have to live with the consequences of what Trump's done

Photo: Joe Raedle/Getty Images

Campaigning for Joe Biden at a car rally in Miami on Saturday, Barack Obama railed against President Trump's response to the coronavirus pandemic, saying "the rest of us have to live with the consequences of what he's done."

Driving the news: With less than two weeks before the election, the Biden campaign is drawing on the former president's popularity with Democrats to drive turnout and motivate voters.