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.
When breathing, the whale emits a spectacular vertical single-column spout up to 12 metres (39 ft), typically 9 metres (30 ft). Its lung capacity is 5,000 litres (1320 U.S. gallons). Blue whales have twin blowholes shielded by a large splashguard.