I’m not sure there’s any way to really understand the scale of the largest black holes in the universe, but Kurzgesagt gives it a good try.
Scale of black holes
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Tooth Fairy Exchange Rate
Calculating how much money a kid gets after exchanging all twenty baby teeth.
Finding the New Age, for Your Age
You’ve probably heard the lines about how “40 is the new 30” or “30 is the new 20.” What is this based on? I tried to solve the problem using life expectancy data. Your age is the new age.
We looked at prime dating age and when people usually marry. Now it’s time for the next step in the circle of life.