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.
In terms of how long a whale can hold its breath varies depending on the species of whale. Some species can only hold their breath for only a few minutes before resurfacing for air while other whales can hold their breath for up to 90 minutes or more.