Project Hail Mary

by Andy Weir

Cool thing about pendulums: The time it takes for one to swing forward and backward—the period—won’t change, no matter how wide it swings. If it’s got a lot of energy, it’ll swing farther and faster, but the period will still be the same. This is what mechanical clocks take advantage of to keep time. That period ends up being driven by two things, and two things only: the length of the pendulum and gravity.

Besides, if I had a nickel for every time I wanted to smack a kid’s parents for not teaching them even the most basic things…well…I’d have enough nickels to put in a sock and smack those parents with it.

Human beings have a remarkable ability to accept the abnormal and make it normal.