Latest calculations from the blog - Page 2
We reverse-engineer harvest dates for grapes, peaches, citrus, and persimmons using GDD, plus a calculator that tells you which variety is actually at peak season right now.
Adjust melt rates of Greenland ice sheet, Antarctic ice sheet, and mountain glaciers to calculate sea level rise directly. An interactive calculator covering IPCC low/high emission scenarios through complete melting, where you can explore different futures by adjusting sliders.
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.
If the whole world flooded with fresh water, why would the ocean still end up salty? We run three models side by side — a fixed-geography dilute-then-recover model, a Pangaea / catastrophic-tectonics back-calculation, and a third that asks whether the flood water itself was fresh or salty to begin with. None of the nine resulting scenarios leaves a salinity band where freshwater and saltwater fish could both survive.
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.