The deepest surface point on Mars is Hellas, about 3 km deep.

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Velcro was invented by a Swiss guy who was inspired by the way burrs attached to clothing.

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The city of Dallas is known as "The Big D."

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The first coast-to-coast telephone line was established in 1914.

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Rome is considered "The Eternal City."

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The surface area of a human lung is equal to that of a tennis court.

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Our eyes can distinguish as many as 10 million distinct colour variations.

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A group of geese on the ground is a gaggle, a group of geese in the air is a skein.

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On Uranus, each pole gets around 42 years of continuous sunlight, followed by 42 years of darkness.

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The smallest island with country status is Pitcairn in Polynesia, at just 1.75 sq. miles/4,53 sq. km.

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