They do it for efficiency, like ducklings after their mother.
Have you ever seen a large boat from above? The wake spreads out behind it, in this v-shape. It’s like a wave following the boat, and the ducklings can “surf” on the v-shaped wave, after their mother, and they don’t have to paddle as hard.
They do it for efficiency, like ducklings after their mother. Have you ever seen a large boat from above? The wake spreads out behind it, in this v-shape. It’s like a wave following the boat, and the ducklings can “surf” on the v-shaped wave, after their mother, and they don’t have to paddle as hard.