WIRED @WIRED
Can you tell what this is? It's not shells—it's sand! It might look normal when you're walking down the beach, but it turns out it's pretty darn cool under a microscope: https://t.co/fVUGIqjEBk (From 2014.) 📸 Gary Greenberg https://t.co/bcz3wXCIQA — PolitiTweet.org