Why Does Poison Ivy Itch?

You’re in the woods, building a fort or exploring, and having a great time. A few hours later, you get a horrible, itchy rash. Argh, poison ivy! Despite the name, poison ivy does not make poison. Instead, every part of the poison ivy plant – leaves, stem, vine, berries, roots – makes an oil called... Continue Reading →

What Happens After You Flush?

Ever wonder what happens to poop and toilet paper after you flush the potty? All your house’s drains empty into the same outgoing sewer pipes. Water (and other things) from your toilet mixes with the water from your shower and your sinks. Any food chopped up with your garbage disposal goes into the sewer, too.... Continue Reading →

How Do Scientists Count Birds?

Get some binoculars and try counting the birds outside your home sometime. It might seem easy at first. You might see a couple of cardinals, maybe a crow. But then those birds fly away, and you see another cardinal. Is that the same cardinal as before, or is it a new one? Now try to... Continue Reading →

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