42,170 years ago.
But its body has been perfectly preserved in near perfect condition in Siberian permafrost,
Wait a cotton-pickin’ minute (no, that’s not racist).
How as a horse hanging out in Siberian permafrost 42,170 years ago? (Are we sure it wasn’t 42,169 years ago?) If it was permafrost then, and it is now, too, then how’d the little foal get up there?
It is conjectured that there was a sudden cold spell that killed many Pleistocene era creatures and preserved their bodies in Siberia’s permafrost. The cold spell could have been due to meteorite impacts or an especially sharp turn toward a cold climactic phase from one of the planet’s recognized climactic cycles.