The Lagrange Point

The Lagrange Point

Here’s something I didn’t previously know about satellites. A satellite orbiting Earth isn’t hovering. It’s constantly falling toward the planet — it just happens to be moving fast enough, and from a distance high enough, that as it falls, it swings...
The Spinach in Your Teeth Problem

The Spinach in Your Teeth Problem

If you had spinach stuck in your teeth after lunch and didn’t know it, would you want someone to tell you? The answer is always yes. Every single time. I have never once had someone say, “No, I’d rather walk around like that all afternoon than feel...