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Curious Cases Series 9 Episodes

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  1. The Cosmic Egg

    How do we measure the age of the universe?

  2. The Atomic Blade

    What makes things sharp?

  3. The Tiniest Dinosaur

    Which is the tiniest dinosaur?

  4. The Enigma of Sex, Part 2

    Why don't we have more than two sexes?

  5. The Enigma of Sex, Part 1

    Why does sex exist? And why aren't we all the same sex?