What the Coronavirus Variants Mean for Testing

In January 2020, just weeks after the first Covid-19 cases emerged in China, the full genome of the new coronavirus was published online. Using this genomic sequence, scientists scrambled to design a large assortment of diagnostic tests for the virus. But the

How the Largest Pterosaurs Supported Giraffe-Like Necks

If you were to gaze skyward in the late Cretaceous, you might catch a glimpse of surreal flying giants with wingspans that rival small planes. This supersized group of pterosaurs, known as azhdarchids, included species that measured 33 feet between wingtips, which

Greg Abbott Speculates Texas Has Herd Immunity

Gov. Greg Abbott of Texas may have been overly optimistic on Sunday when he said on Fox News that his state could be “very close” to herd immunity — the point where so much of the population is immune to Covid-19, either

Biden Wants World Leaders to Make Climate

WASHINGTON — The Biden administration is nearing agreements with Japan, Korea and Canada to bolster carbon emission reduction targets in all four countries ahead of a closely watched summit of global leaders on Earth Day, April 22. But in the latest sign

Darius, ‘World’s Longest Rabbit,’ Goes Missing

LONDON — Have you seen Darius, the world’s longest rabbit? Four feet long and weighing 50 pounds, the heavyweight bunny should be easy to spot. But he went missing this past weekend, and now the police are involved, appealing for information about

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