Wooden shaft and internet: what they have in common

1. Step 1. Wooden shaft — is part of — Fire lance. A spear.
2. Step 2. Fire lance — is made of — Paper. The barrel of a fire lance is a paper or bamboo tube.
3. Step 3. Paper — is material for — Paper coffee filter. Paper.
4. Step 4. Paper coffee filter — works like — Water filter. Filtering a liquid through a porous medium.
5. Step 5. Water filter — is made of — Silica (sand). Slow filters are layers of sand and gravel.
6. Step 6. Silica (sand) — is material for — Internet. The backbones are silica optical fibre.

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