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.