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Ask Dr. Universe rcwebber

Dear Dr. Universe: How do we talk? – Emmy, 7, Wash. State

Dear Emmy, When you were a little kid, maybe you played Peek-a-Boo or sang “Itsy Bitsy Spider.” These kinds of games and songs have a lot of the different sounds we make when we are first developing speech. A lot of humans start out playing with speech through cooing and crying. At about six months old, this cooing and crying turns to babbling. A baby might make sounds such as ma-ma, pa-pa, or ba-ba. Read More ...

Dr. Universe: Why are dogs important to humans? Stephani R., 9, Washington State

Dear Stephani, Dogs are important to humans in all kinds of ways. The connection between the two goes back thousands of years. A long time ago, wolves would trail along after humans on hunting trips and eat any scraps they could find. Eventually these wolves evolved into dogs that helped protect the hunters and gatherers. Read More ...

Dr. Universe: What are shooting stars made of? – Erin, 11, Arkansas

If you are anything like me, you probably like watching for shooting stars in the night sky. A shooting star, or a meteor, is usually a small rock that falls into Earth’s atmosphere. When I went to visit my friend Michael Allen, a senior instructor of astronomy and physics at Washington State University, he told me a lot of shooting stars are no bigger than a pencil eraser. Read More ...

Dr. Universe: Why can’t sea turtles pull back into their shell? I was at the Saint Louis Zoo and they said tortoises and other turtles can pull back into their shells. – Tyler, 7, Missouri

There are more than 350 species of turtles that live on our planet. While many of these turtles live on land, others live in the sea. Depending on where a turtle lives, its body will be a little different. Turtles have adapted to live in different environments and they have traits that help them survive in those places. As you mentioned, a lot of turtles and tortoises on land have the ability to pull, or retract, their head into their body. Read More ...

Dr. Universe: Why do we sneeze? -Nyuma, 10, North Carolina

Imagine you are home sick from school or are just playing outside when all of a sudden—ah-ah-ah-choo! It might seem like that sneeze came out of nowhere, but a lot of things went on in the brain and body to make it happen. That’s what I found out from my friend Hans Haverkamp, a scientist at Washington State University who is really curious about the human body and how it works. Read More ...

Dr. Universe: How does the moon glow? -Reece, Pullman, Wash.

Our moon is one of the brightest objects in the night sky. But unlike a lamp or our sun, the moon doesn’t produce its own light. Light can travel in lots of different ways. Moonlight is actually sunlight that shines on the moon and bounces off. The light reflects off old volcanoes, craters, and lava flows on the moon’s surface. Read More ...

Dr. Universe: What’s the best story ever made in the world? – Jada, 13, New Jersey

Humans have been telling stories for thousands of years. At first, they told these stories out loud, then they started to write. There are more than a hundred million published books on our planet now and to find out which one is best, I visited my friend Matthew Jockers. He’s a professor at Washington State University who combines his love of stories with computer science to research what makes some books bestsellers. Read More ...

Dr. Universe: Back when cell phones weren’t a thing, how could you place a call from across the ocean? Were there wires under the ocean? -Tali, 9, Seattle, Wash.

Long before telephones, if you wanted to say “hi” to friend across the ocean you’d probably write them a letter and send it over on a ship. But in the last hundred years or so, we’ve been able to connect across the ocean much faster. And yes, it often required thousands of miles of wires, or cables, deep in the sea. That’s what I found out from my friend Bob Olsen, a professor of electrical engineering at Washington State University, who told me all about the telephone. Read More ...

Dr. Universe: Why do people litter? – Jenny, 11, California

There is a lot of litter on our planet, but it hasn’t always been that way. For most of human history, people made stuff out of things they found in nature. They might make tools out of rocks or sticks. These things break down and become part of the soil again. It wasn’t until the invention of new materials, like plastic, that we started creating more litter. In fact, along with the rise of these new materials came the word “litterbug.” Read More ...