Why do the eyes of some animals, including goats, have horizontal-shaped pupils, while others, such as rattlesnakes and domestic cats, have vertical slits? It is a question that has longed intrigued ...

Hunt for shapes and make familiar objects by putting together several different shapes. Warm up with a Mystery Math Mistake to tell whether Dotson's 10-frames represent a number more than his focus ...

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. In both cases, the eye’s shape has evolved to help its ...