Interesting and Cool Things to Know

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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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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 is gradually getting hotter and brighter. In about 1.1 billion years from now, our star will become 11% brighter. Life on Earth under such conditions can only survive in the depths of the oceans at best.
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If male and female tigers claim the same prey, males typically back off. This differs tigers from lion males, who use their great power and drive weak females off.
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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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