The Canadian dollar (symbol : $ ; code: CAD) is the currency of Canada. It is abbreviated with the dollar sign $ , or sometimes C$ to distinguish it from other dollar-denominated currencies. It is divided into 100 cents.
14. View. comments. The sperm whale is able to hold its breath underwater for up to 90 minutes because of a unique protein in its blood, an international team of scientists has discovered. The huge mammal will often dive up to 3km deep under water for more than an hour in search of food.
How come whales can hold their breath longer than most mammals? Answer 1: Whales are mammals, just like humans, and their evolutionary ancestors walked on land as we do. Over 50 million years, the ancient creatures spent more and more time in the water, and eventually, stopped coming to land altogether.