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.
This way each breath last longer. The sperm whale's respiratory system is among the most efficient in the world -- it can hold its breath for 80 to 90 minutes at a stretch. The beaked whale can swim without a breath for as long as two hours.