Let’s dive into the world of giants — from the deep sea to dry land — and get to know the planet’s most colossal creatures.

A human heart rate, in comparison, ranges from around 60 to 100 beats every minute. The slowest heartbeat award of any warm-blooded animal must surely go the the blue whale. Believe it or not ...

A whale was recorded “singing his heart out” off the Turks and Caicos islands, video footage shows. Photo from Oliver Tsappis ...

Interestingly, female blue whales are usually larger than the males. Even a blue whale's heart it big. Treehugger shared, "It's the largest heart in the animal kingdom, weighing about 400 pounds.