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.
Mystery of how sperm whales hold their breath for 90 minutes solved as scientists discover the key is unique protein in their blood.
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.