At the dawn of theoretical cosmology, Einstein introduced the so-called "Cosmological Constant" into his equations to explain how the Universe could be static and unchanging in time. He would later say that it was his greatest mistake.

Physical Attraction

Cosmology, Episode V: Einstein's Mistake

Physical Attraction is the show that tries to explain physics... one chat-up line at a time. So whether you're trying to seduce a physicist, or you're a physicist that needs help with seduction, we're here for you. Submit questions on Twitter to @physicspod

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Physical Attraction