Did You Know Who Invented the Zipper?

Which Animal Defends Itself with a Bad Smell?
The skunk is part of the carnivore family and is best known for its strong, smelly spray. When it feels in danger, it sprays a foul-smelling liquid at the threat. The smell is very hard to get rid of, so if you see a skunk then it's best to stay far away!

Why Do We Breathe?
Our bodies need oxygen to create energy. We breathe in air through our nose and mouth, and it travels to our lungs. The lungs pass the oxygen into our blood. When we breathe out, we release carbon dioxide, what our bodies don’t need anymore.

What Bird Is on the American Emblem?
Many people think it’s just an eagle, but it’s actually a bald eagle. It’s easy to mix them up, but they’re different birds. Eagles are birds of prey, while vultures are scavengers.

Who Invented the Zipper?
The idea for a zipper came about in the 1800s, but it was Gideon Sundback, a Swedish-American engineer, who created the modern zipper in 1917. At first, zippers were used mostly for uniforms and winter clothing. Today, we use them for all kinds of things!

Why Do Flames Have Different Colors?
The color of a flame depends on what’s burning. If something has carbon, it usually burns yellow. Carbon dioxide makes a blue flame. Copper gives off a greenish color, and potassium burns purple.

Where Can You Live in a Shoebox?
Not a real shoebox, but Habitat 67 in Montreal, Canada, looks like one! It’s made of large concrete boxes stacked on top of each other, giving the feel of shoeboxes piled high. Each "box" is a home with its own space, air, and light. The building was designed by Israeli-Canadian architect Moshe Safdie.

Which Creature Makes Its Own Light?
Fireflies are famous for glowing, but they’re not the only ones. Glow worms, angler fish, and other creatures can also make their own light. This special glow is called bioluminescence.