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 come whales can hold their breath longer than most mammals? Answer 1: Whales are mammals, just like humans, and their evolutionary ancestors walked on land as we do. Over 50 million years, the ancient creatures spent more and more time in the water, and eventually, stopped coming to land altogether.