The largest animal that has ever lived is not a dinosaur from Yore but a living mammal that still crosses our oceans. The blue whale’s record‑breaking bulk depends on a cardiovascular system pushed to ...

Q. You wrote that blue whales are the largest mammals. What are the largest and smallest animals of other groups? What ecological problems do animals confront by being extremely big or extremely small ...

Whale sharks are the largest species of shark. Their gentle manner and massive size make them the gentle giants of the ocean. However, one especially large whale shark has been spotted off the Pacific ...