KNM 2560 – Fx Jj 16 1060 – Olduwan core, ~ 1.6 million years old

Obtained from africanfossils.org

Printed with the Makerbot Replicator 2 at 0.1 mm resolution

This was a particularly interesting print, since there was a fairly visceral reaction to fitting a prehistoric stone tool to your hand.  I may have hummed Also Sprach Zarathustra a little bit.