Gunpowder and knife: what they have in common

1. Step 1. Gunpowder — is used in — Fire lance. A gunpowder charge.
2. Step 2. Fire lance — evolved from — Spear. The fire lance was a spear with a tube of gunpowder — the first step to firearms.
3. Step 3. Spear — has part — Stone tool. Early spearheads were made of stone.
4. Step 4. Stone tool — evolved into — Knife. The first knives were stone flakes.

Open Evothings