The Scale of the Universe
Summary
Hannah Fry and Michael Stevens explore a visualization showing that the human egg cell sits exactly midway between the Planck length and the observable universe. They discuss the simulation hypothesis, noting how discrete physics might imply a digital reality. The hosts also answer listener questions about why shower thoughts occur, the emptiness of space, and Wikipedia trivia, while correcting a previous historical error regarding Augustine’s views on curiosity.
Topics discussed
Introduction and the 'Powers of 10' visualization
Exploring the scale from Planck length to the observable universe
Oldest known cancer found in a 1.7 million-year-old foot bone
Sponsors: Cancer Research UK, Tremfya, and Sallie Mae
Continuing the scale: Neutrinos, atoms, and DNA
Human egg cells and the 'Powers of 10' documentary
The Simulation Hypothesis and Elon Musk's arguments
Discrete physics, Pi, and the nature of reality
Sponsors: Cancer Research UK and Tremfya
Funny Wikipedia pages: Deaths by laughter and weird photos
The 'First Blue Link' Wikipedia game and the Knowledge loop
Why we have better ideas in the shower
Using allergic reactions to fight cancer
The emptiness of space and the rarity of matter
Correction on Augustine, Aquinas, and curiosity
Outro and final sponsor messages
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