There're so many things in the world we absolutely have no idea about: curious animals, mysterious places, unusual processes in our own bodies. Plus, scientists make new discoveries every now and then. It's so difficult to pay attention to everything new going on - and you don't even need to. You just have to know at least 10 of the facts from this video - and you'll be the most interesting person in the room.

For example, did you know that nails grow with different speed on your hands? Nails on your dominant hand grow much faster. Are you looking at your fingers right now? Good! This is what you can tell your friends in your next smart conversation.

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