The Cambrian explosion saw rapid diversification of life.
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The discovery of anesthesia allowed painless surgical procedures.
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Some metals such as mercury are liquid at room temperature.
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The human brain operates on about 20 watts of power.
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Volcanic lava can reach extremely high temperatures.
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Lightning can heat air hotter than the surface of the Sun.
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The hottest temperature ever reliably recorded on Earth exceeded 130 degrees Fahrenheit.
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Archaeopteryx is considered a transitional fossil between dinosaurs and birds.
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