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What is a virus? Evolution and biology

By |2017-05-30T10:58:32+00:00May 30th, 2017|Biology|

The virus that causes AIDS (greatly magnified) HIV image copyright Russell Knightley Nobody is quite sure whether viruses are living things or not. The first living things may have come from viruses. But it's also possible that viruses evolved from living cells and got gradually less complex and more dependent on their hosts to live. [...]