You might counter that facebook only started in 2004, and didn't get much traction until 2006. But I was invited before that and simply didn't care to join, preferring to occupy other parts of the `net.

Likewise, Clovis artifacts all date from after the peak of the last ice age, when glaciers were melting, land routes were opening, and sea levels were rising to obliterate any coastal artifacts from any previous waves of migration.

Clovis-first has been debunked for decades. This is just another - particularly solid - nail in that theory's coffin. It is worth asking why it has persisted so doggedly. I don't think it is because archeologists aren't very smart people.