How Marine Iguanas Remove Excess Salt From Their Bodies
A marine iguana emerging from the Pacific can look as though it has just sneezed a cloud of seawater from its nose. Moments later, pale crystals may begin accumulating around …
animal physiology
From Hummingbird to Blue Whale: Why Animal Hearts Beat at Such Different Speeds
A ruby-throated hummingbird hovering beside a flower and a blue whale descending beneath the ocean surface face the same basic physiological challenge: their tissues need oxygen, and their cardiovascular systems …