Scientists Find Double Helix Inside Narwhal Tusks

Transcript

1. WinstonToday in Aarhus, Denmark, scientists revealed double-helix structures inside narwhal tusks.
2. AsherSo the sea unicorns were quietly doing structural engineering.
3. WinstonThe outer layer twists left, and the inner layer twists right.
4. AsherA tusk with its own built-in argument. Efficient.
5. WinstonTogether, they help it resist bending and twisting. That seems very sensible.
6. AsherFine. Nature made a sturdy horn and still gave it excellent curls.