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When you gaze up at the night sky, all the stars you see are part of our own Milky Way galaxy. The Milky Way holds 100 to 400 billion stars Learn about how galaxies form, the …

There's much more to stars than meets the eye Our Sun is a star, and it's medium-sized. Super giant stars can be 1,500 times the size of our Sun Come along with science expert …

A giant storm is raging on the planet Jupiter. Scientists have tracked it for about 150 years, but much about the storm remains a mystery. Science expert Velma and the rest of the …

In the northwestern United States, the summer of 1910 was the driest anyone had seen in a long time. The weather was extremely hot and windy. Crops everywhere were drying up. Then …

Today most people travel in vehicles powered by fossil fuels. But what will transportation look like 30 years from now? Will people ride in cars that drive themselves? Will the …

Have you ever seen a shooting star? That's a meteor burning up in Earth's atmosphere Learn where you can spot a meteor shower, how to track down a meteorite, and what makes up a …

Think you know a lot about Earth's natural wonders? Prepare to know even more about the world's biggest deserts, tallest mountains, and deepest canyons. You'll be surprised by how …

YOU are an Asian immigrant in the early 1900s. You dream of a life in American, but first you'll have to pass through the Angel Island Immigration Station. How long will you be …

Think you know a lot about space and the universe? Prepare to know even more about amazing galaxies, stars, planets, and space exploration. You'll be surprised by how much you'll …

When someone mentions the word "robot," what comes to mind? Many people think of mechanical characters often seen in science fiction films. But look around and you'll notice that …