PhysicsSteel foil coated with nanowires does backflips out of water Extremely thin and water-repellent steel wafers not only float when submerged, they harvest power from surface tension and leap out of water ¿ìè¶ÌÊÓÆµ
HumansHow to make ice cream with no freezer, just ice and salt Fancy making ice cream this summer? The secret to soft, creamy and delicious scoopfuls of the stuff lies in the complex science of freezing, says Sam WongRegulars