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Submitted via IRC for Runaway1956
In the deep sea, dragonfish lure smaller fish near their gaping jaws with beardlike attachments capped with a light. But the teeth of the pencil-sized predators don't gleam in that glow.
Instead, dragonfish teeth are transparent and hard to see, thanks to nanoscale structures that reduce the amount of light scattered by the teeth, researchers report June 5 in Matter.
The clear daggers vanish into the animals' dark mouths, probably to help dragonfish surprise their prey, says study coauthor Marc Meyers, a materials scientist at the University of California, San Diego. "They are mini-monsters of the ocean."
The teeth of dragonfish are similar to those of most animals: They contain a dense outer layer of enamel-like material that coats a hard tissue called dentin. But nanostructures in both layers set these tiny chompers apart from others' pearly whites.
Source: https://www.sciencenews.org/article/dragonfish-teeth-transparent-prey
(Score: -1, Offtopic) by Anonymous Coward on Saturday June 08 2019, @09:00PM
Dragonflys are awesome. Awesomest flyers, awesomest insects.
Bonus, they eat mosquitoes.
(Score: 2) by Some call me Tim on Sunday June 09 2019, @03:10AM (1 child)
When the 3D printing filament becomes available you'll be able to make an undetectable knife. Nice!
Questioning science is how you do science!
(Score: 2) by takyon on Sunday June 09 2019, @02:30PM
You can already make knives out of damn near anything:
https://www.youtube.com/channel/UCg3qsVzHeUt5_cPpcRtoaJQ/videos [youtube.com]
Check out the Bismuth knife, that's a fun one.
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