Discover the science behind an ages-old 4th of July tradition with this firework diagram.

What is Pluto? According to scientists... no, not quite. Find out more behind the answer to that age-old question.

Grandma and grandpa didn't always have gray hair. Find out about what gives our hair color and what makes our hair lose that color as we get older.

Help kids understand the size and scope of billions of years with this helpful reference worksheet.

During the Gold Rush, people weren't sure if they found gold or something else, and these easy steps would help them be sure.

Children are introduced to the concept of the speed of light in this illustrated worksheet.

Dinosaurs and other creatures don't exist anymore! Learn the names of some extinct animals, and look for them in this fun wordsearch puzzle.