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.
The deeper a marine mammal has to dive for food, the longer it is going to need to be able to hold its breath to be successful. Humans who have trained can hold their breath underwater for around 20 minutes, but the average person can only hold his or her breath for 1 minute.