Sound as we know it does not exist in space. That’s because, on Earth, sound mainly travels to our ears via vibrating air molecules. Because space is a vacuum, meaning there is no matter at all ...

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life. With a radius of 3,959 miles, Earth is the ...

After learning these fundamentals of geography, kids will have a few fun facts to impress grandma ... geography is actually ...

When it is summer in the Northern Hemisphere, the Earth is not closer to the sun. In fact, it's quite the opposite: The planet is at it's farthest point from the sun during the summer. It is ...