What are alien megastructures and could they be signs of alien civilizations? The search for extraterrestrial civilizations is rife with debate. In the modern age, the search for extraterrestrial life ...
Isaac Arthur on MSN
The oldest alien civilizations may be the ones that never settled
We tend to imagine advanced civilizations as empires rooted to worlds, borders, and megastructures. But this episode explores ...
Physicist Richard Feynman argued that fundamental limits of physics, biology, and time make interstellar contact between civilizations effectively impossible. He cited vast distances, the speed of ...
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