Three surprising facts

I just finished reading The World Without Us, which is about what would happen if all humans suddenly disappeared. Fascinating book. I wanted to share with you three unrelated factoids I gleaned from reading it:
  • Sharks attack about 15 people a year, while people kill about one hundred million sharks a year (mostly for shark-fin soup).
  • Canada contains more lakes than the rest of the world combined. Nearly half the Northwest Territories isn't land at all, but water.
  • We usually think of the food pyramid as bottom-heavy, with a few predators at the top, which feed on many more small animals, which in turn feed on many many more tiny animals and plants. This is true on land, but it turns out the opposite may be true for some marine ecosystems.

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