SUBSCRIBE to Space with Sarah: http://tinyurl.com/k5wxw6x The Earth and our whole solar system is ~4.6 billion years old, but the Universe is a lot older, …
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How old could alien civilizations be? | Space with Sarah #4 | @spacewsarah
SUBSCRIBE to Space with Sarah: http://tinyurl.com/k5wxw6x The Earth and our whole solar system is ~4.6 billion years old, but the Universe is a lot older, …
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![[Space Force] Space Program! 2018!](https://img.youtube.com/vi/9gSUKaH3qKM/maxresdefault.jpg?cc_load_policy=1 "[Space Force] Space Program! 2018!")
