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.
How the sperm whale can hold its breath for 90 minutes Biologists have unravelled why deep diving mammals such as sperm whales can hold their breath for over an hour when diving for food â they have electrically charged proteins in their blood.