Our World
Why Is the Sky Blue?
Sunlight looks white. So why does the sky look blue?
Sunlight contains many colors.
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Our World
Look up. Look down. Look around.
Our planet is full of amazing things waiting to be explored.
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Our World
How Does a Rainbow Form?
How does white sunlight become a rainbow of colors?
Sunlight enters tiny water droplets. The light bends, reflects inside the droplet, and bends again as it leaves.
Our World
Why Does the Moon Seem to Follow Our Car?
Have you ever felt as though the Moon is following your car?
Nearby trees, houses and road signs appear to move quickly because they are close to us.
Our World
What Is Hiding Deep in the Ocean?
What changes as we travel from the ocean surface to the deepest trenches?
Sunlight Zone - the brightest ocean zone, with enough sunlight for photosynthesis.
Our World
Why Can’t Humans Breathe Underwater?
Water contains oxygen, so why can’t our lungs use it?
Water contains dissolved oxygen, but human lungs are designed to take oxygen from air.
Our World
How Can Huge Ships Float?
A giant ship can weigh thousands of tons. Why doesn’t it sink?
Ships float because of buoyancy.