A Shifting Climate Gave Humans Many Opportunities to Leave Africa
The New York Times
A new paleoclimate model finds many favorable windows when Homo sapiens might have survived a migration out of Africa.
Until recently, scientists believed modern humans left Africa in one enormous exodus around 60,000 years ago. But a new climate model suggests that modern humans had several windows of opportunity to leave the continent far earlier. The research, published Tuesday in the journal Nature Communications, reconstructed the climate of northeastern Africa over the last 300,000 years. The scientists identified when there would have been enough rainfall to allow a group of hunter-gatherers to survive the journey to the Arabian Peninsula. Archaeological and genetic data still support the idea that all non-African people descended from a single migration that left the continent between 50,000 and 80,000 years ago. But the new paper bolsters the theory that Homo sapiens had multiple migrations out of Africa.
Some women are stocking up on the medications, saying they are concerned that the new administration could take steps to restrict access.
As the glaciers of South America retreat, the supply of freshwater is dwindling and its quality is getting worse.
It’s something turkey often isn’t — undeniably juicy and a guaranteed crowd-pleaser.
A rise in the disease in younger people was not followed by an increase in deaths, a study found, and might be a sign of overdiagnosis.
The Homotherium cub was preserved in Siberian permafrost with its dark fur and flesh intact.
A small study found ChatGPT outdid human physicians when assessing medical case histories, even when those doctors were using a chatbot.
For a century, exoplanet hunters have “discovered” planets around a nearby star, only to retract the claims. But the latest find is for real.
The unidentified patient had recently returned from Africa, where the virus has caused a deadly epidemic, health officials said.
The event produces some of the year’s fastest meteors, although the nearly full moon may make them challenging to spot.
Mr. Musk dug into his companies’ budgets, preferring to cut too much rather than too little and to deal with the fallout later. Under Donald Trump, he is set to apply those tactics to the U.S. government.
Behind the scenes at a Chicago zoo, chimpanzees who spent years entertaining humans are learning to befriend their own kind.