Interesting and Cool Things to Know

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If we weigh the entire Solar System, it turns out that our Sun contains about 99.87% of all the matter. This is equivalent to about 333 000 Earths.

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The Sun will become a Red Giant in about 7.7 billion years. The radius will increase by 256 times, and the outer layers of the star will reach the current orbit of the Earth.

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Difficult Math Puzzles for Smart People

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Paper is not what paper money is made of! The composition of 75% cotton and 25% linen is actually a conventional standard, which makes up a material highly resistant to mechanical damage.

The temperature in the Sun's core is about 15 million degrees Celsius, while on the surface it is only 5500°C. The core is much hotter because it is where nuclear fusion reactions take place.

Sharks have no bones (except for teeth) but cartilage instead. That's why the only extant remains of megalodons are teeth, but sometimes vertebrae are also found.

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