It's commonly believed that Lorentz contraction makes objects appear flatter along the direction of travel. However, this ignores light travel times. In fact, a fast-moving butt would appear rotated toward the observer but not substantially distorted. Shakira was right.

My new book, Thing Explainer, is out today!
(If you're in NYC, you can also come see me!)

Order: Amazon, Barnes & Noble, Indie Bound, Hudson

A puzzle for UK readers