How Fast Is Blue Whale Cruise?

Blue whales cruise at around 28 km/h despite weighing 180 tonnes. They can sprint to 48 km/h when threatened. Their hearts weigh as much as a small car, and beat just 8-10 times per minute at rest.

Blue whales call to each other across oceans — their low-frequency songs can travel over 1,500 km through deep-water sound channels.

• Despite weighing 180 tonnes
• Heart weighs as much as a small car