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Q12: You are in a hot, dense place.
Q13: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB1587/.jpg" alt=" This figure shows
Q16: Which is the densest planet in the
Q24: Imagine another solar system, with a star
Q25: Early in the history of the universe,
Q37: Some galaxy clusters have not finished forming
Q65: Why does the Milky Way appear as
Q73: Scientific thinking developed only in the past
Q97: In South Africa, it's usually quite warm
Q123: Which of the following is an example