![Soft-Hammer Percussion During the Acheulean: Barking Up the Wrong Tree of Technical Change? | SpringerLink Soft-Hammer Percussion During the Acheulean: Barking Up the Wrong Tree of Technical Change? | SpringerLink](https://media.springernature.com/lw685/springer-static/image/art%3A10.1007%2Fs41982-021-00104-6/MediaObjects/41982_2021_104_Fig11_HTML.png)
Soft-Hammer Percussion During the Acheulean: Barking Up the Wrong Tree of Technical Change? | SpringerLink
![Ann Clarke on Twitter: "Classic hard hammer bulb of percussion. This flint pebble was probably whacked open at some point in the #BronzeAge From excavations at Cruden Bay, Aberdeenshire by @AliTheArchaeol https://t.co/GJTZegSFH8" / Ann Clarke on Twitter: "Classic hard hammer bulb of percussion. This flint pebble was probably whacked open at some point in the #BronzeAge From excavations at Cruden Bay, Aberdeenshire by @AliTheArchaeol https://t.co/GJTZegSFH8" /](https://pbs.twimg.com/media/Eh83g3MXYAAtVTf.jpg)
Ann Clarke on Twitter: "Classic hard hammer bulb of percussion. This flint pebble was probably whacked open at some point in the #BronzeAge From excavations at Cruden Bay, Aberdeenshire by @AliTheArchaeol https://t.co/GJTZegSFH8" /
![North of Kuruman on Twitter: "Did you know that bulbs not only help us to identify stones, but they can also tell us about HOW a tool was made? Hard hammer percussion ( North of Kuruman on Twitter: "Did you know that bulbs not only help us to identify stones, but they can also tell us about HOW a tool was made? Hard hammer percussion (](https://pbs.twimg.com/media/E3hk1wYUUAwbiAT.jpg)
North of Kuruman on Twitter: "Did you know that bulbs not only help us to identify stones, but they can also tell us about HOW a tool was made? Hard hammer percussion (
![Blades produced via hard hammer direct freehand percussion with core... | Download Scientific Diagram Blades produced via hard hammer direct freehand percussion with core... | Download Scientific Diagram](https://www.researchgate.net/profile/Anthony-Boldurian/publication/238448935/figure/fig3/AS:669046991241248@1536524641933/Blades-produced-via-hard-hammer-direct-freehand-percussion-with-core-hand-gripped-firmly.png)
Blades produced via hard hammer direct freehand percussion with core... | Download Scientific Diagram
![Amazon.com: Medical Hammer - Percussion Hammer 6" long with hard rubber head. : Industrial & Scientific Amazon.com: Medical Hammer - Percussion Hammer 6" long with hard rubber head. : Industrial & Scientific](https://m.media-amazon.com/images/I/11x3Xk1cUzL._SY445_.jpg)