Category: STEM

How Skunks Play Fair

11/17/2022

Are skunks aggressive, dangerous animals? Or are they peaceful animals that try to avoid trouble? Well, biologists who study skunks think of them this way: if life were a sport, skunks would be known for their strong defense and for playing fair.

Skunk stinkiness comes from a chemical weapon called musk. Foxes, weasels, and some other mammals also produce musk, but skunk musk is especially strong and long-lasting. And only skunks use musk to defend themselves from attack.

Picture a skunk ambling along in the night, looking for food. It digs in the soil to get tasty earthworms and beetle grubs. The black and white fur that comes with just being a skunk sends a warning. This color pattern is unusual among mammals. It signals: "Beware, don't mess with me!"

Suppose a coyote or other predator ignores this first warning. It steps toward the skunk. When a skunk feels threatened, it faces the danger. It raises its tail and tries to look as big as possible. It stamps its feet and clicks its teeth together. It may growl or hiss.

Oh, oh! Despite all of these warnings, the coyote growls and comes closer. Now the skunk gets really serious. It twists its body into a U-shape, so it can see the coyote and also aim its rear end toward it. The skunk's tail arches over its back, away from its rear—the final warning. This gives the skunk a clear shot, and also protects its own fur from the stinky musk. Skunks try to avoid smelling bad!

From two grape-sized glands, a skunk can spray musk as a fine mist, or squirt a stream. It can squirt accurately for about 12 feet (3.7m), and hit an attacking animal right in the face. The musk stings the predator's eyes, and can blur its vision for a while. And it stinks! Animals hit with this musk learn to never bother a skunk again.

A skunk's glands store enough musk to fire a half dozen shots but then need a week or so to produce more. This is seldom a problem, since a skunk sprays only when its life seems to be in danger. Some skunks can go for months or even years without spraying musk. That's fine with them. Skunks want to avoid trouble, and "play fair" with their many warnings.

A skunks’s stripes point to where the spray comes out. A 2011 study found that animal species that choose fight over flight when faced with a predator often have markings that draw attention to their best weapon. So while a badger has stripes on his face to highlight his sharp teeth, skunks’ stripes are perfectly positioned to highlight their ability to spray potential threats. By http://www.birdphotos.com via Wikimedia Commons

Skunks are so nice that some people want to keep them as pets. The striped skunk is the most social skunk and the one most commonly domesticated. The legality of keeping skunks as pets in the US varies by state, with it being illegal in a majority of them. By Matt MacGillivray via Wikimedia Commons

Larry Pringle has written many animal books, among them The Secret Life of the Red Fox. His The Secret Life of the Skunk was published by Boyds Mills Press in 2019. It is about spring and summer in the lives of a mother striped skunk and her kits.

ML 8 Citation
Pringle, Laurence. "How Skunks Play Fair." Nonfiction Minute, iNK Think Tank, 8 Nov. 2017, www.nonfictionminute.org/how-skinks-play-fair.

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Chimponaut: A Hero Forgotten and Remembered

11/16/2022

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Jan Adkins
The Explainer General

In 1961 the United States was losing the Space Race with the USSR. Our best rockets were blowing up on the launch pads.

But on January 31, 1961, we were ready to send our first astronaut into space on a long, high arc. He was only three feet tall. His name was Number 65. (If the rocket blew up, a “named” animal would sound bad in the news . . ) When asked by radio, 65 would press sequences of buttons on the flight control panel, then receive a banana pellet reward.

The blast off from Cape Canaveral (now Cape Kennedy) wasn’t perfect. The Redstone rocket didn’t blow up, but the launch damaged the passenger pod’s hull. Also, the controls didn’t shut off on time and pushed the rocket much higher, much faster than planned. Ham traveled at 5,800 miles an hour, and reached a then-record high of 155 miles! This put his reentry landing far beyond the U.S. Navy ships sent to retrieve him. The pod splashed into the ocean, but water poured into the damaged pod. 65 was sinking! Two hours later a helicopter picked up the passenger pod just in time.

65 was a hero, so he was given a proper name: Ham. He appeared on the cover of magazines and newspapers as our first man—er, chimp— in space!

In only a few months human astronauts followed Ham’s lead. Alan Shepard and John Glenn rocketed into space and Ham was forgotten. He was given to the National Zoo in Washington, DC, where he lived for 17 years, alone. He was trained as an astronaut and didn’t get along with jungle animals. His keepers noticed that he often lay on his back and punched in imaginary button sequences, as if he were still flying the capsule. The old chimponaut became lonely and depressed.

Ham was sent to a special “show animal” camp where he could reconnect with his wild brothers and sisters. He was taken to Andrews Air Force Base for the trip. As he was walked across the concrete something wonderful happened. He passed between two lines of Air National Guard pilots, saluting Ham. Ham the brave Chimponaut finally got his honor parade.

Ham lived 3 happy years at the camp and died peacefully in 1983. You can see a plaque for Ham at the International Space Hall of Fame in New Mexico. It says:

He proved that mankind could live and work in space.

Ham was fitted into a special bio-pack couch prior to flight to space. His pack and his spacesuit protected him so well that his only injury from his 16 minute and 39 second long flight was a slightly bruised nose.

This famous photo became known as the "hand shake" welcome. It shows Ham being welcomed back to Earth by the commander of the recovery ship, USS Donner.

Once No 65 became a hero and made the cover of Life magazine, he was dubbed Ham. The name is an acronym for the lab which prepared him for his historic mission — the Holloman Aerospace Medical Center, located at Holloman Air Force Base in New Mexico

Adkins new book is about the first drive in an automobile. The wife of the inventor took her kids to see their grandparents.

ML 8 Citation
Adkins, Jan. "Chimponaut: A Hero Forgotten and Remembered." Nonfiction Minute, iNK Think Tank, 9 Nov. 2017, www.nonfictionminute.org/chimponaut:-a-hero-forgotten-and-remembered.

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The Mystery of the Alternating Nostrils

11/14/2022

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Vicki Cobb
The Master Chef of Kids' Hands-On Science

Are your two nostrils exactly the same size? Don’t struggle to find out by looking in a small mirror. Put your nose right above the mirror and breathe down on it. You will see two circles of moisture as the warm moist air from your nose condenses into water when it hits the cool mirror surface. One circle will be a LOT larger than the other.

    You might conclude that yes, one nostril is bigger than the other; that you will have to live with being lopsided. But wait! I mean wait an hour or so and do it again. Surprise! This time the small nostril is now the BIG one! The larger nostril is dominant and takes in more of the air. You can do scientific study of your nose and see just how long each nostril dominates. Perhaps if you check often enough, you’ll discover a time when the two circles will be about the same size. This will be the moment of the changing of the nostrils. Of course, you have to do this study when you don’t have a stuffy nose.

    What’s behind this? It seems that your nostrils are on an automatic timer from your brain so that they take turns being dominant. It’s very interesting. But I’m not sure if it is important.

    Not many people know about this. But your dentist might. A dentist is always looking at peoples’ nostrils. See if your dentist knows about this. He or she might even know why this happens. This just might be a medical mystery worth investigating. And you might be just the one to do it.

Vicki Cobb ‘s “Discover Your Senses” series of books are available through the iTunes store. She begins by asking: “Know how to stop smelling? Hold your nose.” Also, check your library for copies. I mean wait an hour or so and do it again.

Vicki is a member of iNK's Authors on Call and is available for classroom programs through Field Trip Zoom, a terrific technology that requires only a computer, wifi, and a webcam. Click here to find out more.

MLA 8 Citation
Cobb, Vicki. "The Mystery of the Alternating Nostrils." Nonfiction Minute, iNK Think Tank, 21 Nov. 2017, www.nonfictionminute.org/the-mystery-of-the-alternating-nostrils.

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Baking with Bugs: How to Write a Recipe

11/9/2022

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Peggy Thomas
Curiosity queen; writing science, history,
and everything in between

Writing a recipe is harder than it looks. I found this out when a children’s magazine editor asked me to add a recipe to my article about eating insects.

First, I thumbed through my recipe file mentally substituting bugs for a vital ingredient. Mushrooms stuffed with millipedes was out. (Most kids don’t like mushrooms.) I nixed beetle sausage, also. (Too much chopping and frying in a hot skillet.) Flipping to desserts, I chose toffee. I could substitute bugs for nuts.

After my trip to the grocery store for butter, sugar and chocolate chips, I visited the pet shop, and asked for a cup of mealworms, which are fly larvae (also known as maggots, but that’s not very appetizing). The man handed me a little carton that looked like a Skippy cup of ice cream. I wrote that down because I would need to pass that information on to readers who, like me, had no clue how to purchase creepy-crawlies.

With all the ingredients on the counter I recorded each step:

Separate mealworms from packing material. I tried several methods. Blowing on it worked, but when I blew too hard I got a face full of bran and mealworms. (I’d recommend a blow dryer set on low and cool.)
Wash mealworms. Use a strainer with very small holes, and pat dry.
Spread mealworms on cooking tray (one with sides so they don’t crawl off). Preheat oven to 200 degrees. (I’d have to add a note about parent supervision for young readers.) Roast until dry and crunchy.

After that, I was on familiar ground blending butter and sugar, and sprinkling chocolate chips.

I called my concoction Toffee Surprise, and taste-tested it in a large group setting where peer pressure encouraged full participation -- my mother’s birthday party! The verdict: The toffee was yummy, crunchy, and sweet with a subtle earthy aftertaste.

Although I don’t plan on cooking more edible vermin, I did learn some important rules for writing a recipe: Choose a food that is reader-friendly; be aware of your readers’ abilities and safety issues; record every step in order; pay attention to even the smallest details; and prepare it yourself so you can work out the bugs (no pun intended).

Peggy Thomas is the co-author of Anatomy of Nonfiction, the only writer's guide for children's nonfiction. To find out more about Peggy, visit her website. She also has a blog for writers, based on the book.

Peggy Thomas is a member of iNK's Authors on Call and is available for classroom programs through FieldTripZoom, a terrific technology that requires only a computer, wifi, and a webcam. Click here to find out more.

MLA 8 Citation
Thomas, Peggy. “How to Take an Elephant’s Temperature.” Nonfiction Minute, iNK Think Tank, 7 Nov. 2017, www.nonfictionminute.org/baking-with-bugs;-how-to-write-a-recipe.

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How Skunks Play Fair

Chimponaut: A Hero Forgotten and Remembered

The Mystery of the Alternating Nostrils

Baking with Bugs: How to Write a Recipe

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