TIL about the "death spears" of Australia.
These spears have their relatively simple wooden tips covered in adhesive yellow gum sap with multiple embedded stone, wood, and shell chips with later post-European contact spears sometimes including glass shards as an advancement over the stone chips.
Unlike most spears used by hunter-gatherers these seem to have been more specialized for use in warfare instead of a more utilitarian design that can be used for hunting game. Sure, you could kill someone with a regular spear or a wooden club, but the death spears went further and the microliths in the spear tip would imbed in flesh and cause more damage, especially if an attempt to remove the spear was tried, along with a higher probability for infection.
These death spears and similar bone-barbed "war spears" in Australia were usually ~10 feet in length and apparently noticeably bulkier than the ~8 ft spears used for hunting. Aborginal Australians also had their own form of the atlatl called the woomera which helped them fling spears ~70 yards.
There has been a couple British accounts of early settlers & convicts being killed with these spears; sometimes even after the spear was removed. The archeological record suggests that these spears have been in Australia for a while, as recently a skeleton which has been found with microliths found within their bodies matching the description of a death via the death spear has been dated to 4000 years before present. Microliths have been found as late as 15000 years ago, yet it is kinda hard to establish whether these microlith chips were used for death spears.
I got most of this info from Allen & Jones' "Violence and Warfare among Hunter-Gatherers" and Davidson (1934)