title: Why will timeuuid not have any collisions?
body: <p>I was reading <a href="https://docs.datastax.com/en/archived/cql/3.1/cql/cql_reference/uuid_type_r.html" rel="nofollow noreferrer">the Datastax CQL reference</a>:</p>
  <blockquote>
  <p>Collisions that would potentially overwrite data that was not intended
  to be overwritten cannot occur.</p>
  </blockquote>
  <p>Can someone explain to me why a collision will never occur?  Is it impossible or &quot;highly&quot; unlikely?</p>