An inch of rain water is equivalent to 15 inches of dry, powdery snow.

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Tarantulas do not use muscles to move their legs. They control the amount of blood pumped into them to extend and retract their legs.

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The popular name for the giant sequoia tree is Redwood.

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The California redwood - coast redwood and giant sequoia - are the tallest and largest living organism in the world.

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Hydrothermal vents, fractures in the sea floor that spew sulphur compounds, support the only complex ecosystem known to run on chemicals, rather than energy from the sun.

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Wine grapes, oranges, figs and olives were first planted in North America by Father Junipero Sera in 1769.

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The saltiest sea in the world is the Red Sea with 41 parts of salt per 1,000 parts of water.

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Arrowroot, an antidote for poisoned arrows, is used as a thickener in cooking.

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Rainforests act as the world's thermostat by regulating temperatures and weather patterns.

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Certain species of male butterflies produce scents that serve in attracting females during courtship.

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