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How a Saber-Tooth Marsupial Blinded Us With Its Bite

Smilodon fatalis has its name for a reason. With swordlike canines, the saber-tooth cat is widely thought to have waited in silence before lunging and dealing devastating wounds to the…

A Missed Warning About Silent Coronavirus Infections

Listen and subscribe to our podcast from your mobile device:Via Apple Podcasts | Via Spotify | Via Stitcher At the end of January, long before the world understood that seemingly…

U.S. Weighs Early Vaccine Access for Minorities and Others at Risk

Federal health officials are already trying to decide who will get the first doses of any effective coronavirus vaccines, which could be on the market this winter but could require…

Japan’s Deadly Combination: Climate Change and an Aging Society

TOKYO — The forecast was dire: close to nine inches of rain in a single day. Officials in Kuma, a village on the banks of a fast-moving river in southwestern…

Live Coronavirus Updates: U.S. Daily Cases Surpass 59,000

Here’s what you need to know: ImageA drive-through test site in Dallas on Wednesday. Texas was one of at least five states to set a new single-day record for new…

Daily Coronavirus Cases in the U.S. Soar Past 50,000 for the First Time

Here’s what you need to know: ImageVehicles lined up at a testing site in Austin, Texas, on Thursday.Credit…Tamir Kalifa for The New York Times The U.S. surpasses 50,000 new cases…

Australia Locks Down 300,000 in Melbourne Area After Coronavirus Surge

MELBOURNE, Australia — Ring Mayar spends all day knocking on doors in the western suburbs of Melbourne, asking residents if they have a cough, a fever or chills. Even if…

Lester Grinspoon, Influential Marijuana Scholar, Dies at 92

Dr. Lester Grinspoon, a Harvard psychiatry professor who became a leading proponent of legalizing marijuana after his research found it was less toxic or addictive than alcohol or tobacco, died…

Did a Mutation Help the Coronavirus Spread? More Evidence, but Lingering Questions

For months, scientists have debated whether a variant of the coronavirus that has come to predominate in much of the world did so partly because it is more transmissible than…

Coronavirus Cases in U.S. Are Rising, Even as Death Rates Trend Down

Here’s what you need to know: ImageMedical workers at United Memorial Medical Center in Houston on Thursday transporting a patient from the Covid-19 intensive care unit.Credit…Go Nakamura/Getty Images As infections…