- Your liver has over 500 functions.
- Rainbows can only be seen in the morning or late afternoon (the sun needs to be less than 40 above the horizon).
- All the people on Earth could fit into a 1 km cube.
- Some dinosaurs had tails over 13m (45 feet) long.
- Wearing headphones for just an hour will increase the bacteria in your ear by 700 times.
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