The big "huddle" that happens when things get cold. As energy leaves a system, p...
The most dramatic growth spurt in the physical world. Give a gas a little bit of heat, and...
How a simple rise in temperature moves the fluid in a thermometer. Liquids react to heat e...
Why do bridges have metal gaps and railroad tracks buckle in the sun? When solid objects g...
Everything is moving, even if it looks perfectly still. On a microscopic level, atoms are ...
The hidden reservoirs that sustain life. Deep underground, massive layers of rock and sand...
The science of "holey" rocks and soil. Understanding how much empty space is in ...
The battle for where the rain goes. When the ground can't keep up with the rain, water...
Why do some puddles disappear instantly while others stay for days? The mix of sand, silt,...