I’ve been allergic to fleas ever since I was a kitten. Flea bites give me an itchy, red rash.
I talked about why that happens with my friend Bevan Briggs. He’s a nurse practitioner and professor at Washington State University. Nurse practitioners are nurses with advanced training. They diagnose illnesses, order tests and prescribe medicine.
Briggs told me that often rashes happen when the immune system gets turned on. The immune system is the body’s defense system.
“It's the way our body tries to protect us from germs and poisons,” he said. “Rashes happen because your immune system identifies something as foreign—either an infective agent or some kind of toxin.”
When it rains, sometimes we can see oil on the street rise to the top of puddles and spread out into a rainbow of colors.
One of the main reasons we see color is because of light, said my friend Cigdem Capan, a physics instructor at Washington State University.
She reminded me that when our eyes sense colors, we can trace those colors back to different wavelengths of light. Perhaps you can make some waves in the air with your hand. Make small, tight waves. Now make a big, wide waves. Read More ...
Ever since humans discovered they could use sand to make glass, they’ve been experimenting with it. They even learned how to control the colors.
My friend Dustin Regul is a stained glass artist and painter who teaches fine arts at Washington State University. He told me more about where glass gets its color.
“It’s actually metals that help change the color of the glass,” he said. Read More ...
If you have a long winter break ahead and are looking for a great way to spend the afternoon, you might just want to make your very own snow globe. There are a few different ways to build a snow globe, but the first thing you’ll need is the perfect container.
To make a small snow globe, you might use something like an empty baby food jar. Or maybe if you want to make a bigger snow globe, you could choose an empty spaghetti sauce jar. Read More ...
Whether you have an innie or an outie, pretty much all us mammals have a belly button. But before you had a belly button, there was actually a different bit of anatomy in its place.
While you were still growing inside of your mother, a small, bendy tube on your tummy connected the two of you. This tube is how you got pretty much everything you needed to grow before you were born into the world. Read More ...
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.
Just the other day I looked up and wondered the very same thing. The sky is certainly blue, I thought. But on second thought, it isn’t always blue. Sunsets burst in pink and orange. The night sky is black.