simple explanations

who was the first person on earth

Who was the first person on Earth?

what happened to the dinosaurs

What happened to the dinosaurs?

why snakes shed their skin

Why do snakes shed their skin?

why do fish live in water

Why do fish live in water?

why do cats purr

Why do cats purr?

why do we dream

Why do we dream?

why does our heart beat faster when we run

Why does our heart beat faster when we run?

why do we have belly buttons

Why do we have belly buttons?

why do we sneeze

Why do we sneeze?

why does the moon change shape

Why does the moon change shape?