Science and Engineering: Innovation, Research, Education and Economics
August 7, 2008
Viruses and What is Life

Viruses are generally considered not to be alive (they must use a host cell of something else to reproduce). However, defining exactly what life is, is not as easy as you might think.

The debate about what counts as a living thing is fuelled today by the discovery of the first virus that is able to fall “ill” by being infected with another virus.

the discovery of a giant virus that itself falls ill through infection by another virus seems to suggest they too are alive, highlighting how there is no watertight definition of what exactly scientists mean when they refer to something as “living”.

“There’s no doubt, this is a living organism,” the journal Nature is told by Prof Jean-Michel Claverie, director of the Mediterranean Institute of Microbiology in Marseilles, part of France’s basic-research agency CNRS. “The fact that it can get sick makes it more alive.”

Related: People Have More Bacterial Cells than Human Cells - Bacteria Feed on Earth’s Ocean-Bottom Crust - Retroviruses - Bacteriophages: The Most Common Life-Like Form on Earth

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