Our kidneys have many tubes; if we would merge them, they would form a long thin tube 65 kilometers long.
The power of the first lasers was measured by the number of razor blades the laser beams could pass through.
For a spacecraft to overcome the Earth’s gravity, it needs an average speed of 12 kilometers per second.
Mammoths became extinct 1,000 years after Egyptians completed the construction of the pyramids.
The average weight of a male brain is 1450 grams, while the weight of an average female brain is about 1300 grams.
Donald Duck comics were banned in Finland. The reason for the prohibition was the fact that Donald Duck does not wear pants.