Calculations that zoom out to the planetary, galactic, or otherwise jaw-dropping scale
Roughly 109 billion humans have ever lived and died. If every one of them entered heaven, how large would it need to be? We treat floor area per soul as the key variable, calculate heaven's required footprint under three admission-rate scenarios, and compare the result against Earth's surface area and the specific dimensions Revelation 21 gives for the New Jerusalem — then ask what happens when you add the animals.
Since 1950, humanity has produced roughly 8.3 billion tonnes of plastic. Split evenly by world population, that comes to over a tonne per person — yet only 9% was ever recycled, and 886 kg of your share is sitting in a landfill or the ocean right now. We run the numbers and show how much the recycling rate actually matters.
A solo Santa would need to fly thousands of times the speed of sound — but that's not even the real problem. Three scenarios, a Fermi estimation, and one genuinely surprising bottleneck.