Series
What If, Calculated
What if every traffic light turned green? What if a giant asteroid hit Earth? What if everyone jumped at the same time? We take impossible what-ifs and work them all the way out with numbers and simulations.
7 episodes YouTube playlist
Episodes
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What If a City Had No Red Lights? We Simulated 2 Towns
It depends on the town: with no crashes, the countryside got 24% faster while the big city just tied with normal signals.
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Can We Stop a 10-km Asteroid Before It Hits Earth?
The earlier you push, the smaller the speed needed to make the asteroid miss — though it depends on where it sits on its path.
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What If All 8.3 Billion People Jumped at the Same Time?
Earth does move — but even with everyone gathered in one place, its center of mass shifts only about 2.6×10⁻¹⁴ m at the jump's peak.
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Can You Pass a Test by Rolling a Die? 10,000 People and All of Humanity
Yes — 10 of 10,000 dice-only test-takers passed the 20-question test (median of 3 simulation runs).
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What If Everyone in Japan Flushed at the Same Time? We Ran the Numbers
The small street pipe near your home hits its limit first: 4.4 times its limit when everyone flushes within 10 seconds.
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What If You Drop a Ball Through Earth? We Calculated Spin and Air
From New York, a straight-down tunnel 3.3 ft (1 m) wide ends at the eastern wall after about 14 seconds.
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What If the Moon Were Half as Far? We Calculated Its Size and Orbit
At half distance with its original circular-orbit speed, the Moon first approaches to about 64,000 km after about 2.6 days.
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