The stench reaching Parliament gave momentum to an existing drainage project. Follow the intercepting sewers and pumping stations that redirected London’s waste—and the limits of… Read More »How Did London’s Great Stink of 1858 Change Its Sewers?
A mountain-wave lenticular cloud does not trap the air inside it. Repeated condensation and evaporation can preserve a nearly stationary outline while air flows through.
Discover how microscopic hooks let a feather vane reconnect, why birds preen, and why reattachment is different from healing broken material.
Color within glass, painted details fired onto its surface, and metal strips joining the pieces do different jobs. Here are three ways to read a… Read More »How Do Color and Dark Lines Become a Stained-Glass Picture?
Tiny ice crystals refract light to form 22-degree solar and lunar halos. Compare real photographs to understand angular radius, rainbows, coronas and clues to changing… Read More »What Makes the Rings Around the Sun and Moon?
Support and propulsion are different questions. Explore surface dimples, microscopic leg hairs and subsurface vortices to understand a water strider’s movement.
