1866 – Miners in Calaveras County, California, discover what is now called the Calaveras Skull – human remains that supposedly indicated that man, mastodons, and elephants had co-existed.
1866 - Petambang di Calaveras County, California, menemukan apa yang saat ini disebut Tengkorak Calaveras - sisa-sisa jasad manusia yang mengindikasikah bahwa manusia, mastodon dan gajah pernah hidup berdampingan.