Showing results for "Una" in Science & Technology

In the waters of the Atlantic Ocean, planes and ships have vanished without a trace. Stories say something is taking these vehicles. Is it possible the legends are true?

Children learn how rain forms, what floods and droughts are, and why rain is an important part of our weather.

Futurologist Luna Lee presents possibilities for the future of medicine in the next 100 years.

Why do dogs bark? Do they get lonely? These questions and more are answered in this fun and engaging book for young listeners.

A young readers edition of the New York Times bestseller The Disappearing Spoon, chronicling the extraordinary stories behind one of the greatest scientific tools in existence: the periodic table. Why did Gandhi hate iodine (I, 53)? How did radium (Ra, 88) nearly ruin Marie Curie's reputation?...

I bet you've seen a furry gray animal scurrying across the highway late at night—you know, the one with the pink snout and long tail? That's an opossum, and it is a marsupial. Did you know that it is related to all sorts of different animals, including the kangaroo and the Tasmanian devil? Welcome to the wild, wonderful world of marsupials, a group of mammals found around the globe, though mostly in Australia and Southern Asia.

Some places are so high that they touch the clouds. Listen to this book to find out more about places with very high elevations.

Rumble, rumble! Here comes the dump truck.

All science classrooms discuss animals that hibernate during winter months, but few know about animals that estivate—a prolonged sleep during hot or dry periods. Learn about the reasons estivating animals become dormant—whether it's because warm weather threatens food supply or to avoid increased body temperatures. From the ladybug to the salamander, from the lungfish to the desert hedgehog, twelve estivating animals and their habits—both when sleeping and awake—are explained clearly and elegantly.

Help tell the story of Benjamin Franklin's discovery of electricity! Together with your friend, act out this play to learn how Benjamin Franklin used a wire, attached to the top of a kite, to attract lightning from the sky. Lightning is a form of electricity! It travelled down the kite string to the key that created electric sparks! How did Franklin come up with the idea for his famous experiment?

Dogs are amazing creatures with amazing bodies! Discover how fur protects their delicate skin, and which body parts gives them balance. Did you know dogs can wiggle their ears in many directions? Learn more facts about dogs and how their unique anatomy is different from other animals.

Have you ever wondered what living in space would be like? Meet the Kellys who are identical twins and both astronauts for NASA. With one brother in space and the other on Earth, they are an experiment to learn how human bodies that share the same DNA are affected by living in space for a long time. What do you think NASA can learn from this twin science study?

Can you imagine having to sit still for 30 minutes just to have your picture taken? Or having to send film away to be developed? Technology has come a long way since then! Listen to learn about photography inventions like flashbulbs, Kodak and Polaroid cameras, and more!

Many things look very different seen up close. To us, the sun is a giant ball of light in the sky, but to other solar systems, it might look like just another star! Those tiny lights you see in the night sky are what our sun might look like from another planet far out in space. The sun gives light and energy to our entire solar system, and is necessary for many other things. Can you name them all?

Getting shots may not be any fun, but these vaccinations prevent dangerous diseases. Learn how vaccinations help keep us healthy.

Are there more than 13 planets in our solar system? Learn how astronomers categorize the objects out in space.

Fathers come in all shapes and sizes. In the animal kingdom, fathers have some fascinating (and strange!) ways of helping their young. Some animal dads protect their babies. Some provide food. Some teach survival skills.

Did you ever think about how many things in your life would vanish if there were no wheels?

Native Americans mastered the cultivation of the "Three Sisters" crops to round out their diet. Can you guess which vegetables these are?

Learn about America's founding conservationists: Theodore Roosevelt, Gifford Pinchot, Stephen T. Mather, Hugh Hammond Bennett.