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.
Aleix Segura Vendrell, who set a world record for holding his breath underwater for 24 minutes and 3 seconds, is a proponent of this very technique. Don't hold air in your cheeks. This method is meant for an air reserve, which requires letting go of the air in your lungs and switching it with the air in your cheeks.