2020 Ties 2016 as Hottest Yet, European Analysis Shows

Last year effectively tied 2016 as the hottest year on record, European climate researchers announced Friday, as global temperatures continued their relentless rise brought on by the emission of heat-trapping greenhouse gases. The record warmth — which fueled deadly heat waves, droughts,

A Riot Amid a Pandemic: Did the Virus, Too, Storm the Capitol?

Three distinct groups — Capitol Police, rioters and members of Congress — “were spending time indoors, without social distancing, for long periods of time,” said Dr. Joshua Barocas, an infectious diseases physician at Boston University. The melee likely was a super-spreader event,

The Leftovers Route to Dog Domestication

Dr. Lahtinen and her colleagues take competition out of the equation. In winter, ice age humans would have had to forego plants, depending on hunting. But people can’t survive on protein alone. Eventually they starve or get protein poisoning. They need fat,

Bryan Sykes, Who Saw the Ancient Past in Genes, Dies at 73

What’s more, unlike nuclear DNA, mitochondrial DNA passes virtually unchanged from mother to child, with a predictable rate of mutation that gave Dr. Sykes and other researchers a way to draw links between modern populations and ancient ones. After the success of