Viruses are weird. They swim around, and reproduce, and act as parasites on any unlucky animal who happens to pick them up. But still, they're so dependent on their hosts that some biologists think they don't get to count as living beings on their own — more like random pieces of genetic coding that get in the way of the body's normal function. But the discovery of a virus infecting another virus has scientists questioning that belief.
It's Alive!! ...Or Is It?
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