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The legendary falling-sand sim, now in your browser. Drop powder, spark circuits, boil water, then blow the whole thing up and start over.
★The dot over the letter 'i' is called a tittle.★A day on Mercury lasts 59 Earth days.★A newborn kangaroo is about the size of a jellybean.★Butterflies taste with their feet.★Avocados are toxic to most animals except humans.★Humans share 60% of their DNA with bananas.★The human brain uses about 20% of the body's total energy.★If you lift a kangaroo's tail off the ground it can't hop.★The shortest war in history lasted 38 to 45 minutes between Britain and Zanzibar.★Peanuts aren't nuts, they are legumes.★A snail can sleep for three years straight.★The first computer mouse was made of wood.★Pigeons can recognize themselves in a mirror.★Dolphins have names for each other.★There are more stars in the universe than grains of sand on every beach on Earth.★A rhinoceros' horn is made of keratin, the same stuff as hair.★Hippos can't actually swim, they walk along the riverbed.★Dolphins sleep with one eye open.★Ancient Egyptians slept on stone pillows.★Tigers have striped skin, not just striped fur.
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