Dr. Universe

Ask Dr. Universe: Why do we have blood? Where does it come from?

Our bodies have many living parts, like skin, muscle, brain and bones. Blood helps keep these parts alive and healthy. The system that moves our blood around the body is sort of like a city’s postal service, said my friend Astrid Suchy-Dicey. Suchy-Dicey is a scientist at Washington State University who is really curious about […]

Ask Dr. Universe: Why do we need stars?

PULLMAN, Wash. – If you are anything like me, you like watching the night sky. The stars we see are a lot like our nearest star, the sun. They are just much farther away. That makes stars look like small twinkly things instead of a big, furious thing like our sun.

Ask Dr. Universe: Why are plants green?

PUYALLUP, Wash. – A lush tropical rainforest, a field of sunflowers, a garden in your neighborhood. Our Earth is home to all kinds of plant life. From trees to catnip, there are thousands of different species of plants. Most of these plants are green, but not all of them.