Mars:

Fourth planet from the sun. Mars is about 141 million miles (about 228 million kilometers) from the sun and revolves around the sun in 687 days. Mars is smaller than Earth, about 4,221 miles (about 6,796 kilometers) in diameter. A Martian day is only about 40 minutes longer than our…

Explore Science Dictionary

Seymour Science Blog

I grew up in New York City and never really had much to do with horses. (Though I do have a photo of me when I was a kid alongside a cute pony.  I don’t really remember much about the…

READ MORE
Seymour Simon on Facebook and Twitter Become a Seymour Simon Facebook Fan Follow Seymour's field notes and photos