605179 external_news 1523976594 1523980134 Here's a thought to make your skin crawl: Viruses are the most abundant entities on the planet by far. And trillions upon trillions fall from the sky every day, according to a recent study that was the first to tell us just how many viruses float above the Earth. Now you know why School of Biological Sciences Professor Joshua Weitz was one of three researchers calling for a better understanding of viral ecology in a 2017 editorial in Nautilus. There is a silver lining to this virus deluge; some of them may actually be good for their hosts.

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