Can You Swim in Shade Balls?
AdultsEducationIndustrySciencePhysicsFun... I bought 10,000 shade balls and tried to swim in them. They appear to act like a non-Newtonian fluid: rigid under high shear stress, but they flow like a liquid under low shear.
World's Lightest Solid!
AdultsConstructionMediaSciencePhysicsSpace... Aerogels are the world's lightest (least dense) solids. They are also excellent thermal insulators and have been used in numerous Mars missions and the Stardust comet particle-return mission.