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We humans have always been explorers. The great civilizations that have arisen across the world are owed to our restless ancestors. These days, there’s not much of Earth left to explore. But if we look up, there’s a whole universe out there waiting for us. Future generations may one day explore the cosmos and even settle entire other galaxies. But there is a hard limit to how much of the universe we can expand into. So, how big can humanity get?
Episodes Referenced:
Is Interstellar Travel Possible?: https://youtu.be/wdP_UDSsuro.
What If Humanity Is Among The First Spacefaring Civilizations?: https://youtu.be/uTrFAY3LUNw.
The Edges of Our Universe by Toby Ord: https://arxiv.org/pdf/2104.01191.pdf.
A causal limit to communication within an expanding cosmological civilization by S. Jay Olson: https://arxiv.org/pdf/2208.07871.pdf.
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