Human eyes are so sensitive that in perfect darkness, they could detect a candle flame from 30 miles away.
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The Earth's rotation is responsible for the Coriolis effect.
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The human brain operates on about 20 watts of power.
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Your brain uses 20% of your energy.
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A blue whale's heart can weigh over 400 pounds.
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The Eiffel Tower was once the tallest man-made structure on Earth.
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The longest winning streak in professional sports can span years.
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The Sumerians developed one of the earliest known writing systems.
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Water covers more than 70% of Earth's surface.
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