A new virus-like entity has just been discovered - 'obelisks' explained

Viruses, being unable to replicate without the help of a host, can most generously be considered to be on the edge of what constitutes life. Yet the estimated 10 nonillion (one followed by 31 zeroes) individual viruses on the planet can be found in every conceivable habitat and, through infecting and manipulating their hosts, have probably affected the evolutionary trajectories of all life.

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