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5 Unsolved Space Mysteries: Scientific American

by Kenny Hoeschen

Scientific American’s web series, The Countdown, looks at the top five unsolved space mysteries.

1. Could there be life currently living on Mars?

2. Where do ultra-high energy cosmic rays come from?

3. What causes a type Ia supernova to occur?

4. What is dark matter?

5. How will the universe end?

If you’ve solved any of these mysteries, be sure to alert local authorities.

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