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Articles on Curious Kids US

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Franklin Delano Roosevelt, standing at center and facing left just above the eagle, takes the presidential oath of office for the third time in 1941. FDR Presidential Library and Museum via Flickr

Has any US president ever served more than eight years?

Only one president has done so – Franklin Delano Roosevelt – but others considered it, and even tried.
There are so many different states – and provinces, districts, regions and lander! Getty Images

How many states and provinces are in the world?

The U.S. is broken up into 50 states, plus territories like Puerto Rico and Guam, and a federal district, Washington, D.C. Most other countries have smaller parts too.
This skull, found in France, was among the first fossils to be recognized as belonging to our own species. DEA /G. Cigolini via Getty Images

How did humans evolve, and will we evolve more?

Our biggest evolutionary advantages are an ability to walk on two legs and our big brains.
Toilets in space are a bit more complicated than those on Earth. Don DeBold via Wikipedia

How do astronauts go to the bathroom in space?

Going to the bathroom is much more complicated in space without any gravity. To solve this problem of tricky orbital potty breaks, NASA builds special toilets that work without gravity.
In addition to being fun, video games can build real-world skills. Carol Yepes/Moment via Getty images

Is gaming good for kids?

Research shows multiple social and cognitive benefits of playing video games.
A floral scent can be enjoyable for a person, but it has an important job for the flower. Richard L. Harkess

Why do flowers smell?

Not all flowers smell good, to people at least, but their scents are a way to attract pollinators.
A leap and a plunge into the snow could earn this arctic fox its supper. Jupiterimages/PHOTOS.com via Getty Images

How do arctic foxes hunt in the snow?

Arctic foxes have a few special talents that help them sneak up on unseen prey and pounce.
A person falling into a black hole and being stretched while approaching the black hole’s horizon. Leo Rodriguez and Shanshan Rodriguez

Could a human enter a black hole to study it?

If you are a sci-fi junkie you've probably wondered what would happen if you were unlucky enough to fall into a black hole. How well you'd fare all depends on the type of black hole.
The jet stream can have a big impact on how long a plane ride will last. Aeroprints via Wikimedia Commons

Why does it take longer to fly from east to west on an airplane?

When planes fly from east to west, they are flying against a river of air called a jet stream. These air currents can make your flight longer or shorter, depending on which way you are going.
Children begin to learn grammar well before they start school, when they craft their first short sentences. RonTech2000/iStock via Getty Images Plus

Why does grammar matter?

Grammar isn't a way to bully people for making mistakes, says a longtime English instructor. It is a way to understand how our language operates, in all its many written and spoken varieties.
A tiger’s vertical stripes help it blend in with trees and grasses in its homelands in Asia. Frédéric Soltan/Corbis via Getty Images

Why do tigers have stripes?

How do tigers – a top predator – successfully hunt their prey when they have bright orange fur? The secret's in their stripes!
Geese fly day or night, depending on when conditions are best. sharply_done/E+ via Getty Images

How do geese know how to fly south for the winter?

Geese honk loudly and point their bills toward the sky when they're ready to start the migration. Here's how they know it's time, how they navigate and how they conserve energy on the grueling trip.

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