@ZverMind on Instagram: "Why This Man Building a Roof with Grass A man is building a roof entirely out of grass. It looks like it would rot in the rain, but this is actually one of the most advanced construction methods in history. It’s called thatching, and people in the UK and Ireland have been using this technique for over 4,500 years, all the way back to the Bronze Age. By using a ridged paddle to beat the straw, they pack the layers so tightly that they create a natural barrier against wind