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Protractor Confiscated At The Shard
- Matt had a giant homemade protractor confiscated at the Shard because security said it could be a weapon.
- He described its plumb line and how the perspex chunk looked like glass, leading to its removal.
Graphene Roll Reaches Halfway Around Earth
- Graphene is a single-atom-thick hexagonal lattice of carbon with extraordinary strength and tiny thickness.
- Using
0.5 nm thickness, a 12 cm toilet-paper roll of single-ply graphene would stretch about 20 million meters (20,000 km).
Graphene Thickness Depends On Measurement
- Measuring graphene thickness is nontrivial and depends on the measurement force; it can be squashed.
- The Institute of Physics paper suggests a practical single-layer thickness near 0.43 nm, so Matt used ~0.5 nm in his estimate.