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.
14. View. comments. The sperm whale is able to hold its breath underwater for up to 90 minutes because of a unique protein in its blood, an international team of scientists has discovered. The huge mammal will often dive up to 3km deep under water for more than an hour in search of food.
Stig Severinsen has written a book called Breatheology which helps people find their 'inner dolphin' - a state of mind to help control breathing underwater. He also holds the record for the longest underwater swim, travelling 500ft (152m 40cm) in just two minutes and 11 seconds.