According to the myths of the Aborigines of Australia, there was a time long ago when two great beings, the Eagle and the Crow, were in conflict with each other. Both hunted with spears, but only the Eagle knew how to make spearheads with backward-pointing barbs, which would stay in to make the kill.
The Eagle tried to protect its secret, but one night, when everyone else was sleeping, the Crow took the Eagle's spearhead out of its hiding place and had a good look at it.
From then on, the Crow was able to make barbed spearheads and kill its own kangaroos.#3205•