Extended Data Fig. 9: Images of split branch, BLB4 (‘notched stick’; Fig. 2e).
From: Evidence for the earliest structural use of wood at least 476,000 years ago

Above, close-up of the facet/chop-mark with arrow indicating direction of initiation. Below, all views of split branch with chop (white arrow) and close-up of the entry facet. The object was found cracked in situ.