On land, Emperor penguins move two ways. The first is in the familiar waddling walk they do which is actually a good method in conserving energy. Some folks suspect penguins waddle because they don’t have knees, but in fact they do have a femur, fibula and tibia that form a knee joint; it’s just that the bones are so short. read more
For example, one study revealed that diving emperor penguins have heart rates significantly lower than that of their heart rates at rest. During one emperor penguin’s impressive 18-minute dive, its heart rate decreased to as low as three beats per minute, with a rate of six beats per minute lasting for over five minutes during the dive. read more