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During their life, a human produces such an amount of saliva that it could fill up an entire swimming pool.
The human survives approximately one month without food but just one week without water.
Onion, apple and potato have identical taste. Their different flavor is only given by their aroma.
The total amount of ocean salt could cover all of Europe by a layer-width of 5 km, which is 10 times more than the highest building in the world.
Cats can produce more than 100 sounds but dogs only 10.
Lions may be scary but they are also very lazy. They sleep or just relax more than 20 hours a day.
A mole can dig a 90 meter-long tunnel in just one night (almost the length of two large swimming pools).
If the amount of liquid in your body declines by 1% you start to feel thirsty.