29: The Goldilocks Planet
Update: 2024-01-12
Description
If the sun was dimmer 4 billion years ago, how did the Earth stay warm?
Today, we learn how just a small percent of Earth's atmosphere goes a long way in controlling global climate, both today and in the ancient past. Along the way, we'll visit an imaginary frozen Earth without any sun, a hazy giant moon of Saturn, and learn exactly what the greenhouse effect is.
Extra credit: Visit a greenhouse, or find a cleaning product with ammonia.
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