Scans tell gripping tale of possible ancient tool use
Fossils contain inner signs of humanlike hands nearly 3 million years ago
![Hand bones](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/01/bb_skinner1.jpg?fit=860%2C460&ssl=1)
ADVANCE HAND High concentrations of spongy inner bone in an ancient hominid’s knuckles and thumb base (indicated by arrows, red indicates more spongy bone) suggest humanlike hands evolved nearly 3 million years ago.
M.M. Skinner et al/Science Vol. 347, issue 6220 (2015)