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Earth is about 4.54 billion years old
Radiometric dating places Earth's age at approximately 4.54 billion years.
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A cloud can weigh around a million pounds
A typical fair-weather cumulus cloud can contain roughly 1.1 million pounds of water.
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Bananas are slightly radioactive
Bananas contain a tiny amount of naturally radioactive potassium-40 along with ordinary potassium.
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Saturn is less dense than water
Saturn's average density is lower than the density of liquid water.
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Rainbows are full circles
A rainbow forms as a complete circle around the point opposite the Sun, although the ground usually hides its lower portion.
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