People enjoy an outdoor art exhibition in downtown Los Angeles in early July. Los Angeles County public health authorities are now urging unvaccinated and vaccinated people alike to wear face coverings in public indoor spaces because of the growing threat posed by the more contagious delta variant of the coronavirus. Robyn Beck / AFP via Getty Images
Originally published on August 4, 2021 2:27 pm
Updated August 4, 2021 at 12:50 PM ET
With the highly contagious delta variant surging ferociously, Americans are once again grappling with pandemic anxiety.
The surge has prompted a flurry of new mask mandates, vaccine mandates and other steps to try to get the coronavirus back under control.
Delta Is Surging Here s What You Need To Know To Stay Safe
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Delta Is Surging Here s What You Need To Know To Stay Safe
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The line between alive and dead is often murky, argues New York Times science columnist Carl Zimmer
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Posted: Apr 16, 2021 4:28 PM ET | Last Updated: April 16
Carl Zimmer s new book explores the nature of life, including questions like whether a cut rose is still alive.(Lisa Mariee Williams/Getty Images) comments
Quirks and Quarks17:03Contemplating what it means to be alive in the new book ‘Life’s Edge’
About 4 billion years ago, give or take a couple of hundred million years, the whole trouble started.
In a warm puddle, or perhaps around a geothermal vent in the deep ocean, or perhaps somewhere we haven t identified yet, a mixture of chemicals started to do something new something more complicated than they d done before. It was the dawn of life.