A newly discovered cache of 27 carved and sharpened bones from elephants and hippos found in Tanzania’s Olduvai Gorge site pushes back the date for ancient bone tool use by around ... but not used as ...

A newly discovered cache of 27 carved and sharpened bones from elephants and hippos found in Tanzania’s Olduvai Gorge site pushes back the date for ancient bone ... used as a spear or projectile ...

A newly discovered cache of 27 carved and sharpened bones from elephants and hippos found in Tanzania’s Olduvai Gorge site pushes back the date for ancient bone ... used as a spear or projectile ...