https://apnews.com/630cc6950839a634a14a34b2f626d5f6

NEW YORK (AP) — Whales are big, but why aren't they bigger? A new study says it's basically about how many calories they can take in.

That's the conclusion of researchers who used small boats to chase down 300 whales of various species around the world. They reached out with a long pole to attach sensors to the creatures with suction cups, allowing them to record what the animals were doing on their dives for food.