Calculations about the absurd questions that pop up in daily life
A 10 km commute by car uses far more energy per passenger than a bus — unless the bus is nearly empty. We break down energy intensity (MJ per passenger-km) across eleven transportation modes, from walking to electric cars to rockets, then apply it to one real trip — New York to Los Angeles, about 3,940 km (2,450 mi) — to see which one actually wins, and how badly occupancy and grid mix can reverse the rankings.
Using the Biblical dimensions of Noah's Ark (300×50×30 cubits), we calculate total volume and compare it to the number of species and average animal size. The real bottleneck isn't floor space — it's how often the air needed to be exchanged.
By mapping 8.11 billion people across 26 UTC time zones and overlaying a sinusoidal sleep-wake model, we calculate the global wakefulness curve. The peak hits UTC 06:12 — London 6 a.m., New York 1 a.m. — at roughly 5.9 billion awake, because India and China together account for 39% of humanity. Even at the trough (UTC 18:12), 2.7 billion people are still up. The swing ratio is 2.2×.
Two numbers, two completely opposite stories. The odds that one specific person out of 109 billion historical humans is your pre-assigned partner: about 13,400 times worse than winning the lottery. The realistic expected count of compatible people you'll actually meet in a lifetime: roughly 50 — with the probability of meeting at least one rounding to 1.000.
With 800,000 theatrical films in existence and 6,000 more arriving every year, even a lifelong 16-hour-a-day viewer reaches only 15.5% of the catalog — and immortality tops out at 58%. We run the numbers across three film-count scenarios and calculate exactly how many corn kernels the popcorn bill comes to.