What Causes Thunder? The Shock Wave Hidden Inside Every Lightning Bolt
What causes thunder? Lightning heats the air to about 30,000 °C in a split second, and the air explodes outward as a shock wave. See every step, plus safety.
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How Does a Rainbow Form? The Journey of a Sunbeam Through a Raindrop
How does a rainbow form? Follow one sunbeam into a raindrop as it bends, splits into colors and bounces back at 42 degrees, and learn why rainbows are round.
What Shape Is a Raindrop? Not a Tear, More Like a Bun
What shape is a raindrop? Not a teardrop. Learn how surface tension, air drag and size turn falling rain into tiny buns, parachutes and spheres, step by step.
Why Do Clouds Float? The Secret of Tiny Droplets and Rising Warm Air
Why do clouds float if they weigh as much as 100 elephants? Discover how tiny droplets, rising warm air and moist air keep clouds in the sky until they rain.
What Is the Water Cycle? A Raindrop’s Endless Journey Around the Planet
What is the water cycle? Follow one raindrop through evaporation, condensation, precipitation, runoff and infiltration, and see why Earth never runs dry.