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 ...

A collection of down-to-Earth facts about our planet and its place in the solar system. This collection introduces the Sun as the main source of light and heat on Earth. It explains that the Earth ...

But true stewards of the planet inspire people outside the family to keep the Earth clean. Start by helping your kids organize a weekly or monthly Garbage Club. Talk through who to recruit—and ...

Most of the planets (including Earth!) are hidden from view—geophysics is how we know everything about the Earth below the ...