Summer on Uranus lasts for 21 years.
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The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
The population of the Earth has more than doubled since 1950.
151
Only 55% of Americans know that the sun is a star.
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