The Diary Of A CEO with Steven Bartlett

Quote · The Diary Of A CEO with Steven Bartlett

Neil deGrasse Tyson On Aliens, Simulation Theory, and What Happens Inside A Black Hole

Explore episode Jul 9, 2026

Where this was said

How Small Are We in the Universe?

At 15:40 · chapter starts 7:30

Steven Bartlett describes feeling 'insignificant' after watching Cosmos, and Tyson immediately pushes back on the framing. Size is not a linear concept — it's exponential, measured in powers of ten. Humans are large compared to atoms and small compared to galaxies, but that doesn't make us cosmically unimportant. Tyson also notes that life forms could theoretically exist at molecular or nuclear scales — entities for whom we would look impossibly large and slow. He introduces a fascinating thought experiment from his alien book Take Me To Your Leader: are we biased toward expecting life at human scale? He also uses the Pixar film A Bug's Life to illustrate how surface tension — irrelevant to humans, vital to insects — demonstrates that physical laws manifest entirely differently depending on scale. You can't just 'scale things up' and expect the same behavior.

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