Dr. Universe: What are shooting stars made of? – Erin, 11, Arkansas
rcwebberDr. Universe: What’s the best story ever made in the world? – Jada, 13, New Jersey
rcwebberDr. 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.
rcwebberDear Dr. Universe: Why does it hurt when we pull a muscle? -Dakota, 12
rcwebberDear Dakota,
Our big, strong, stretchy muscles can help us run, jump, and play. But sometimes these muscles stretch a little too far and it can really hurt.
Read More ...Dr. Universe: What can I do to help stop ocean pollution? -Hailey, 10
rcwebberDear Dr. Universe: Why do flowers smell so nice? – Miles, 5
rcwebberDr. Universe: How many peas would fit in the sun? -Keegan, 8
rcwebberDear Dr. Universe: How many different types of plankton are there? Are there freshwater plankton? – Arielle, 11
rcwebberDr. Universe: Why do gadgets need batteries? How do they work? -Shereen and Jasmine, 8, Florida
rcwebberDr. Universe: Why do we get morning breath? -Stephanie, 10
rcwebberHow do volcanoes erupt? –Miles, 10, Tampa, FL
rcwebberDr. Universe: Why do we have a belly button? – Jane, 9, Kennewick, WA
rcwebberDr. Universe: What is the most smelliest fruit in the world? -Tiana, 9
rcwebberDr. Universe: How do earthquakes happen? -Aescli E., 10, Utah
rcwebberDr. Universe: Why do we have five fingers and five toes? -Eli, 11, Edinburgh, Indiana
rcwebberWho created the very first chocolate bar? – Emma, 11, USA
rcwebberDear Emma,
For most of human history, people have enjoyed chocolate in a spicy, bitter drink. But when people discovered how to turn chocolate into a solid, it opened up a whole new world of possibilities.
That’s what I found out from my friend Omar Cornejo, a scientist at Washington State University who is very curious about the history and life of the cacao tree. Chocolate comes from the seeds of leathery fruits that grow on the tree.
If we cut open the fruit, we would find about 20 to 60 seeds on the inside. In ancient times, people would grind up the seeds … » More …
Read More ...Dr. Universe: Why does music give us chills? -Nicole, 11, Spokane, Wash.
rcwebberDear Friends,
If you are anything like me, maybe you’ve suddenly felt a chill while listening to music. Perhaps, you got goosebumps and saw your arm hairs stand on end. Maybe you even teared up.
Read More ...Dr. Universe: What is happening when we sleepwalk? -Daniel, 11, Easton, CT
rcwebberDear Daniel,
Our brains work hard to help us move, talk and think. They also help us sleep. When we rest, some parts of our brain are active. When we are up and moving around, parts of our brain are actually at rest.
Read More ...Dear Dr. Universe: What food is sweet and good to eat? – Sophia, Pullman, WA
rcwebberDear Sophia,
There are quite a few foods that are sweet and good to eat. A lot of them are fruit, said my friend Pablo Monsivais. He’s an associate professor at the Washington State University Elson S. Floyd College of Medicine.
Read More ...Why do lizards lose their tails? -Bailey, Inwood, Iowa
rcwebberDear Bailey,
Our planet is home to all kinds of lizards. Maybe you’ve seen one climbing up the wall, scurrying through the grass, or at the pet store. Just the other day I saw a big green iguana when I visited the Washington State University Veterinary Teaching Hospital in search of an answer to your question.
Read More ...Dear Dr. Universe: What is a glacier? – Addison, Pullman, WA
rcwebberDear Addison,
When snow piles up and compresses into a thick mass of ice, we call it a glacier. But a glacier is really more than ice and snow.
Read More ...Dear Dr. Universe: Why do worms come out when it rains? -Courtney, Moscow, ID
rcwebberDear Courtney,
That’s a great observation. When it rains, worms sometimes leave their home in the soil and wiggle their way up to the surface, where we see them on sidewalks and roads.
Read More ...Dr. Universe: How come broccoli is good for you? -Zack, 10, San Lorenzo Valley
rcwebberDear Zack,
You aren’t alone if you’ve ever heard someone at the dinner table say, “you’ve got to eat your broccoli.” Broccoli is one of nature’s superfoods, so it’s no wonder we are often encouraged to eat those little green trees.
Read More ...How do grasshoppers survive the winter? –Lucy, 9
rcwebberDear Lucy,
There are a lot of different grasshoppers living on our planet. In fact, scientists have discovered more than 11,000 species. Exactly how these grasshoppers spend their winter depends on what kind of winter they experience.
Read More ...Where does rain go? –Finn, 8, New Zealand How does pollution affect the world’s water? – Emily, 13
rcwebberDear, Finn, Emily, and friends:
When a raindrop falls from a cloud, there are quite a few places it could end up.
Read More ...Dear Dr. Universe: I have a question for you about ants. From what I searched on Google, an ant has a nervous system, blood, open circular system, muscles, and a brain. So, Dr. Universe, the question is, do ants or other insects get headaches? Cause they work hard. –Joseph, 14, Singapore
rcwebberDear Joseph,
If you’ve ever had a headache, it might have felt like pain was radiating right out of your brain.
Read More ...Dear Dr. Universe: What did our ancestors eat? -Bushra, 10, Kuwait
rcwebberDear Bushra,
Our ancestors weren’t very picky eaters. In fact, they ate pretty much whatever they could find, wherever and whenever they could find it.
Read More ...Dear Dr. Universe: I would like to find out how ants are so strong. How is it possible that they can carry weight that is heavier than themselves? –Anita, 11
rcwebberDear Anita,
Ants are pretty good little weightlifters. My friend Rich Zack, a scientist at Washington State University who studies insects, knows a lot about ants. One kind of ant that he has studied can carry up to 20 times its own weight.
Read More ...Why do people grow hair under their nose? Why does it grow down instead of up? –Riley, 11, Prior Lake, MN
rcwebber
Dear Riley,
Humans have hair all over their bodies, including above the upper lip. Of course, not all hair is quite the same. A lot of people have very fine hairs on their faces. Others can sprout a thick beard or mustache.
Read More ...What do astronauts eat in space? –Rhemi, 12, St. Louis, Mo.
rcwebberDear Rhemi,
Astronauts eat all kinds of different foods up in space. The food is often similar to what we have here on Earth. But in space, there's very little gravity. There’s very limited refrigeration, too. On the International Space Station, the refrigerator is only about half the size of a microwave. That means scientists who prepare and package astronaut food have to do it in ways that take up very little room and don’t need to be kept cold.
Read More ...Dear Dr. Universe: What causes lightning? -Monica, 10, Costa Rica
rcwebberAnd while we’re at it, let’s answer these questions:
When lightning strikes the ocean, what happens to the fish? –Olivia, 12, Manchester, UK
Why is lightning attracted to metal objects? –Grant, 11, Pullman, Wash.
Why does lightning sometimes just happen in clouds? –Leo, 11, Cayman Islands
Dear Monica, Olivia, Grant, and Leo:
While you are probably not in the middle of an electrical storm right now, there are more than 1,000 happening at any given moment on our planet. They happen on Saturn, Venus, and Jupiter, too.
Dear Dr. Universe: Why do snakes shed their skin? - Kalitia, 12, Zimmerman, Minn.
rcwebberDear Kalitia,
Believe it or not, pretty much all animals shed their skin. Some animals make it a bit more obvious than others. Snakes, and some other reptiles, will often shed all at once.
Read More ...Why do we have different feelings? - Charan and Aishwarya V., 10 & 8, Rutherford, New Jersey
rcwebberDear Charan and Aishwarya,
Imagine you are playing a game of soccer and your best friend is on the opposing team. The sun is out, you are having a great time, and you score the winning goal. You’d probably feel pretty happy and so would your team.
Read More ...Why does meat get brown on the grill? – Christina, Seattle, Wash.
rcwebberDear Christina,
You know summer is just around the corner when the smell of barbecue is in the air. It’s a great question you ask and it leads us to the Meats Lab at Washington State University. That’s where I met up with my friend and animal scientist, Jan Busboom.
Read More ...How do animals get to islands? -Jax, 8, Wash.
rcwebberDear Jax,
Animals make their journeys to islands in different ways. Some float. Some fly. Others will swim.
Read More ...How do turtles live so much longer than other animals? -8th grader, Lewiston, Idaho
rcwebberDear Reader,
You’re right, turtles and tortoises live a lot longer than most other animals. If you were a turtle, you might live for more than 150 years. One giant Galápagos tortoise named Harriet even lived to be more than 170 years old, said my friend Donna Holmes.
Read More ...How do viruses affect animals? -Gianni, 10, Cayman Islands
rcwebber
Dear Gianni,
Our planet is home to more than seven million amazing animal species. While we have our differences, we also have something in common: We are all made up of a bunch of cells.
Read More ...Why do we have blood? Where does it come from? –Norelle, Olympia, Wash
rcwebberDear Norelle,
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.
Read More ...How do ladybugs survive the winter? Are ladybugs we see in spring several years old or did they just hatch? Are they worms before they are beetles? – Tanya, Pullman, WA
rcwebberDear Tanya,
You know it’s springtime when animals start coming out of hibernation. That includes ladybugs that crawl out from their cozy winter hiding places.
Read More ...Hello! My name is Daiwik and my question is "Why are stars in space? Why are they needed? Can they be made on Earth?" No one I know knows the answer to this. Can you find out for me?- Thanks, Daiwik P.S. You're awesome!
rcwebberDear Daiwik,
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.
Read More ...Dear Dr. Universe: Do you know how human and animal interactions help our mind grow? Does it help us? Does it do nothing? This has fascinated me for a very long time. - Gabby G., 11, Berlin, VT
rcwebberDear Gabby,
Our brains are pretty busy. They are constantly thinking, feeling, and sensing our world. One thing that can help some people relax is spending time with an animal friend. You might play fetch with a dog, sit with a cat, brush a horse, or even watch a goldfish zip around its bowl.
People who spend a lot of time with animals might tell you that something special seems to be going on here. But scientists are looking for evidence and want to find out for certain just what is going on. They want to know … » More …
Dear Dr. Universe: Why are plants green? – Nadia, 8, Australia
rcwebberDear Nadia,
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.
Read More ...How do I program a computer? –Ammon, 11, Magna, UT
rcwebberDear Ammon,
Everything our computers do, they do because we program them to do it. Maybe you want to design a game or an app that’s brand new. To create that game or app, you have to help your computer understand what to do.
Read More ...Dear Dr. Universe: How do our ears work? -Aryana, 11, Ohio Dear Aryana,
rcwebberThe chirps of birds. The squeaks of mice. The barks of dogs. In a world full of different sounds, our ears take in almost everything. But it takes more than just our ears to hear.
Read More ...Dear Dr. Universe: What are crystals? Who discovered them? -Kennedy, 9, Little Rock, AK
rcwebberDear Kennedy,
Maybe you’ve caught a snowflake on your tongue. Or sprinkled salt on your food. Perhaps you’ve imagined what it would be like to explore a big crystal cave.
Read More ...Dear Dr. Universe: What is slime? How can I make it? -Nina, 10, Richmond, VA
rcwebberDear Nina,
Our world is full of slime makers. Slugs and snails leave behind gooey trails. Bacteria can create layers of slippery slime in water pipes. Even your body makes its own kind of slime. In our joints, we have slime that helps protect our bones.
Read More ...Dear Dr. Universe: Is it possible that we are growing every second? - David, 9, Camas, Wash.
rcwebberDear David,
When I was a kitten, I used to keep track of my growth. Every now and then, I’d make a little pencil mark on the wall right above my ears.
Read More ...Dear Dr. Universe: Why do animals hibernate? -Jarrett T., 10, Edinburgh, IN
rcwebberDear Jarrett,
Animals can get through winter in all kinds of ways. Us cats like to curl up on a cozy couch. Some penguins huddle in groups to create heat. A lot of birds fly south to warmer weather. Perhaps you put on mittens and a coat.
Read More ...Hi Dr. Universe! I'm Bree and I just wanted to ask, how do cats land on their feet? -Bree, 10, Williamsburg, VA <
rcwebberDear Bree,
Curiosity can lead us cats to some pretty great heights. We like to climb trees and sneak along tall bookshelves. Sometimes we might have a bumpy landing, but more often our amazing cat reflexes help us land on our feet.
Read More ...Dear Dr. Universe: How do we remember stuff? -Aidan, 11, Franklin, Indiana
rcwebber
Dear Aidan,
Our brains have an incredible ability to help us remember all kinds of stuff. Of course, memory isn’t perfect. Sometimes we forget our homework or where we left our favorite cat toy.
Read More ...Dear Dr. Universe: Why does the Earth spin? -Morven, 8, Dundee, Scotland; Judith, 9, Sabah Malaysia; Mara, 11, USA
rcwebberDear Morven, Judith, and Mara:
No matter how still we stand, or if we’re in Scotland, Malaysia, or the United States, we are always spinning. Our Earth spins at a constant, very fast speed as we make a trip around the sun.
Read More ...Why are apples red? -Emily, 5, Seattle, WA
rcwebber
Dear Emily,
Just the other day I was biting into a crunchy, delicious red apple when I was reminded of your question. I started wondering why apples are red, too.
Read More ...Why do cheetahs run so fast? -Shanyu, 9, London, UK
rcwebber
Dear Shanyu,
Cheetahs are in really good shape. Not only are they good runners, but the actual shape of their body helps them move at incredible speeds.
Read More ...Why do onions make us cry? -Kera, 5, Lawrenceville, GA
rcwebberDear Kera,
Try as we might, it can be hard to hold back tears while chopping up onions.
Read More ...Why do we feel pain? -Sara, 11, Moscow, Idaho
rcwebberDear Sara,
Pain is unpleasant, but we need it for survival. Just the other day I was out exploring when I stubbed my paw and let out a big meow. My nervous system was doing its job.
Read More ...What is the smallest insect on Earth? -Laurenz, 8, Molino, Philippines
rcwebberDear Laurenz,
When I saw your question, I set out to explore with my bug net and a magnifying glass. I was searching all around for tiny insects when I ran into my friend Laura Lavine, a Washington State University scientist who studies bugs.
She said there are nearly a million different kinds of insects on Earth. The smallest of all the known ones are called fairyflies.
Read More ...What is the deepest spot in the ocean? -Lawrence, 11, Philippines
rcwebberDear Lawrence,
Deep underwater, not too far from Guam, lies a crescent-shaped canyon called the Mariana Trench. It is home to the deepest known spot in the ocean: The Challenger Deep.
Read More ...Hi, Dr. Universe! When I was eating breakfast today, I came up with this question. Why does crispy rice make a popping sound when I pour milk over it? It makes me curious as a cat! -Allison, 11, Pullman, WA
rcwebberDear Allison,
My ears perked right up when I got your question. Like you, I’ve heard the sounds crispy rice cereal makes. But the truth is, I wasn’t entirely sure why it happens. There was only one way to find out.
Read More ...Are there creatures on Earth with one eye? -Elena, 7, Vancouver, Canada
rcwebberDear Elena,
The animal kingdom is full of amazing eyes. And yes, there are actually creatures on our planet that have just one.
Read More ...How do plants hold dirt? -Gordon, Pullman, WA
rcwebberDear Gordon,
The other day, I wandered into a Washington State University greenhouse and ran into my friend Mechthild Tegeder, a professor and expert on plants.
She gently dug a small plant out of a pot so we could take a closer look. When she lifted it up, I pawed at the clumpy soil hanging from the bottom to reveal some stringy roots.
Read More ...What is the Kuiper Belt? -Zaara A., 7, Deep Bay, Australia
rcwebberDear Zaara,
You might say the Kuiper Belt is the frozen frontier of our solar system. Out beyond Neptune’s chilly orbit, this saucer-shaped region is home to Pluto, billions of comets, and other icy worlds.
“The Kuiper Belt is really the edge of knowledge,” said my friend and astronomy professor Guy Worthey when we met up in the Washington State University planetarium.
“Out there it’s a little dim,” Worthey said. “We are pretty far from the Sun.”
In fact, it’s about 3 billion miles away. Even at the speed of a jet airplane, it would take more than 680 years to travel from Earth … » More …
Read More ...Why is there iron in my cereal? Is there iron in other food? -Phillip, 11, Pullman, WA
rcwebberDear Phillip,
Iron is found in buildings and skyscrapers. It makes up most of the Earth’s core. It’s even found in the Sun and stars. And yes, it’s also in a bowl of cereal.
Read More ...Why is the ocean salty? -Alysin, 10, Ruston, La.
rcwebberDear Alysin,
At first, I thought the answer to your question might take us deep into the ocean. But it turns out the source of our salty seas is actually on land.
Read More ...Why do we have earwax? -David, 10, Albany, Oregon
rcwebberhttps://www.youtube.com/watch?v=as4TWgC4xxA
Dear David,
The other day I was scratching my ears when I noticed some yellowish-brown gunk on my claw. It was pretty gross, but it also made me very curious.
Read More ...What is Dr. Universe's favorite experiment? -Garrett, 8th grade, Eastern Washington
rcwebberDear Garrett,
You know, your question reminds me of a couple other science questions from curious readers. Evangeline, age 7, wants to know why her hair is black. Sureya, age 8, wants to know why some people have curly hair.
It just so happens that one of my favorite science projects explores our questions about what makes us unique. It has to do with our DNA, or the blueprint for life.
Read More ...Why do we get brain freezes -Hannah, 9, Monroe Elementary
rcwebberDear Hannah,
You’re enjoying some ice cream, when suddenly you feel a pain in your head that hurts a whole lot. It’s like it came out of nowhere, and in a matter of seconds, it’s gone.
Read More ...Why is Pi 3.1415...? What if it was just 3? -anonymous
rcwebberDear Curious Readers,
It’s almost March 14. You know what that means: Pi Day, as in 3/14, or 3.14159265359 and so on.
I met up with my friend Nathan Hamlin, a mathematician and instructor here at Washington State University, to explore your question about this never-ending number.
We calculated Pi with some of my favorite items: yarn and a tuna can. You can try it at home, too.
Read More ...What are boogers? -Taryn, 9, Seattle, WA
rcwebber
What exactly is a booger and is it harmful to eat? -Concerned grandpa
Dear curious readers,
When I went to visit my friend Susan Perkins, an instructor of nursing at Washington State University, she shined a tiny light in my nose. Sure enough, she found some crusty little boogies.
Read More ...Are we getting lazier? -Aaryan, 9, Timber Ridge
rcwebberDear Aaryan,
We cats have a reputation for being lazy. We sleep a lot. But the truth is when I got your question, I didn’t know much about laziness. So, I decided to talk about it with a couple of psychologists here at Washington State University.
My first stop was the Psychology of Physical Activity Lab. That’s where I met up with my friend, Professor Anne E. Cox.
Read More ...What are fingernails made of? -Amy, 8, Seattle, WA
rcwebberDear Amy,
My claws can come in quite handy when I need to scratch my ears or climb trees. I bet you’ve found that your own fingernails can be useful tools, too. Perhaps you’ve used them to pick up a penny or peel an orange.
Read More ...How does snow form? -Susan, 8, Lake City, South Carolina
rcwebberDear Susan,
It just so happens that when I looked out the window here in Pullman, Wash., everything was covered in glittering snow. I watched it fall from the sky and wondered how exactly it formed, too.
Read More ...Why is yawning contagious? -Grant, 10, Pullman, WA
rcwebberDear Grant,
When I got your question, I met up with my friend Hans Van Dongen, a scientist at Washington State University in Spokane. He works in a research lab where they study sleep. As a cat who appreciates naps, it’s one of my favorite places to visit.
Read More ...What causes stomachaches? -Autumn, Austin, Texas
rcwebberDear Autumn,
Stomachaches happen for lots of reasons, but they can often be traced back to tiny invaders in the human body: germs.
Read More ...Dear Dr. Universe, Please answer this question: Do animals dream? What dreams do they get? I humbly request you to answer these questions. BYE! Or should I say MEOWY! -Prahlad R.
rcwebberDear Prahlad,
After a quick catnap and a stretch, I went to visit my friend Marcos Frank, a scientist at Washington State University who studies animal sleep.
Read More ...What exactly are greenhouse gases and the greenhouse effect? -Andres, 10, Bolivia
rcwebberDear Andres,
If it weren’t for greenhouse gases, Earth would be an extremely cold, deserted planet. Plants couldn’t grow and animals like us wouldn’t be able to survive.
Read More ...Can frog babies hear their mothers croaking underwater? -Ella, 9, Seattle, WA
rcwebberDear Ella,
Baby frogs go through some pretty big changes to become grown-up frogs. They start out as tiny tadpoles with just a head and a tail to help them swim. They have an inner ear and can hear some sounds.
Read More ...Dr. Universe: Are aliens real? -Lily, 10, New York City, NY Is there life on other planets? -Heidi, Cincinnati, OH
rcwebberDear Lily and Heidi,
Well, we don’t know for certain. Looking up to the stars at night, I’ve often wondered if alien cats are out chasing alien mice or taking naps on other planets.
My imagination aside, your questions are like those scientists are asking, too. And it’s no wonder we are so curious.
With billions of planets in our galaxy, including small Earth-like worlds, the possibility of life out there is an exciting thought to many people. So, humans have set out to look for planets that might support life.
In fact, this month scientists announced the Kepler spacecraft’s discovery of … » More …
Read More ...