Developed by NASA 🚀, LI-900 is one of the lightest solid materials ever created. Made of 99.9% air and just 0.1% silica, this ultra-light aerogel can survive extreme heat up to 1,200°C — while the other side stays cool to the touch. So strong yet feather-light, it once protected spacecraft during atmospheric re-entry, proving that sometimes the most powerful materials are almost… nothing. #nasa #spacetech #futuretech #technology