Please literally explain it like I’m 5! TIA
Edit- thank you for all the comments and particularly for the links to videos and further info. I will enjoy trawling my way through it all! I’m so glad I asked this question i find it so mind blowingly interesting
In: 4425
1. There are lots of stars
2. Lots of those stars have habitable planets
3. Lots of those planets are much older than our own
4. Why has no one contacted us?
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