Interesting facts about penguins

Penguins are flightless aquatic birds living mostly in the southern hemisphere of the Earth, except for a single species
which lives near the Equator.

Some experts have argued about their classification as birds due to their inability to fly and having stiff flippers instead of soft and flexible wings.

However, most scientists believe that those are not the only reason to consider an animal as a bird; features like a beak, plumage or laying eggs and some other anatomical characteristics are determinant to classify them as birds.

Nevertheless, penguins are the only family of water birds that cannot fly; most believe that this was part of a natural process of evolution and adaptation to a habitat where there was no need to migrate long distances or flee from many predators.

Instead, they evolved to have an improved anatomical design to be agile underwater and regulate their body temperature according to weather conditions of their habitat.

Penguin fossils dating back about 60 mill