Bone and parachute: what they have in common

1. Step 1. Bone — is material for — Harpoon. The oldest harpoons (Katanda, ~90,000 years ago) are carved from bone.
2. Step 2. Harpoon — has part — Rope. A line connects the head to the hunter.
3. Step 3. Rope — is part of — Parachute. The lines are ropes.

Open Evothings