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The quick, little sting of a vaccine shot can provide us with some big protection from germs that cause disease.
One kind of germ is a virus. Viruses are so small that you can’t see them even with a normal microscope. But if you use a more powerful electron microscope, you’d see each one wears a kind of coat with bits and knobs that stick out in different directions.
“Just like every person’s face looks different, every virus coat looks different,” said my friend Felix Lankester, a veterinarian at Washington State University.
Just the other night, I grabbed my binoculars and looked up to the starry sky. At first the stars looked white, but when I looked closer I noticed some appeared more blue and red.
I was curious to find out exactly what color they were, so I visited my friend George Newman. He’s a physics and astronomy instructor at Washington State University.
He said that a star mostly emits the kinds of light that our eyes see as red or blue.
“The thing that determines which color they give off most is their temperature,” he said.