PhysicsTo create a wormhole that doesn't collapse, you need exotic matter Making a wormhole that a human could theoretically travel through would require an upside-down universe and negative energy Features
PhysicsWe finally know why bubbles rise in a straight line in champagne In carbonated drinks, the wake from rising bubbles can disturb other bubbles. But when the molecules that give fizzy drinks their flavour coat the bubbles, they can form stable columns as they float News