Olympic Track Stars Are Running on Crushed Sea Shells. Here's Why.

<img width="128" height="52" src="https://www.sciencealert.com/images/2024/08/WomensHurdlesParisOlympics.jpg" alt="Four women competing in hurdles on a purple track"/>
It's the fastest Olympic track yet.

https://www.sciencealert.com/olympic-track-stars-are-running-on-crushed-sea-shells-heres-why