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" ... But viruses also play a very constructive role in life, and Part Two (Everywhere in All Things) examines bacteriophages--viruses that destroy bacteria; marine phages, which scientists believe have the potential to help develop new vaccines; and our own inner parasites, endogenous retro viruses, which are part of our evolutionary heritage. ... "
" ... “It was speculated for a while that bacteriophages (viruses that affect only bacteria) – there was no talking about other viruses – that the DNA might be pressurised. Some scientists believed it and some didn’t. But there was no experimental evidence. No-one had done those measurements,” says Professor Evilevitch. ... "