Why Do Animal Pupils Have Different Shapes? Here are the evolutionary reasons behind three of the most common types of animal pupils: round, vertical, and horizontal. By Manasee Wagh Published ...

It's the first thing you see about an animal — where their eye is located and what the pupil shape is." For their recent study, Banks and his colleagues decided to keep things simple.

There's a reason why the domestic cat's pupil has its distinctive, vertical slitted shape and the grazing goat's its horizontal, flattened look. Creepers' peepers: Why animals' pupils have ...

The yellow-bellied toad is sure to win the hearts of even the most hesitant of anuran appreciators, being an adorable little amphibian with heart-shaped pupils.

A new study shows that like humans, crows can recognize geometric regularity, making them the first nonhuman animal known to have this ability. Squares, triangles, circles - these geometric shapes ...

A key question that remains in biology and biophysics is how three-dimensional tissue shapes emerge during animal development. Research teams have now found a mechanism by which tissues can be ...

Tigers have round pupils, but domestic cats have vertical slits in the center of their eyes. What gives? A census of the shapes of animals' pupils suggests size and way of life each play a big role.