When you think about fossils, you probably picture the big-money stuff: T-Rex skeletons, perfectly preserved mammoths and the like. Compared to them, the vast majority of fossils are relatively tiny and seemingly insignificant -- until you think about all the knowledge that scientists have gleaned from them over the years.
Question 1 of 10
A preserved piece of a plant or animal can officially be called a fossil if it's more than how many years old?
Question 2 of 10
What's the fossil record?
Question 3 of 10
About how far back does the fossil record go?
Question 4 of 10
According to the information we have from the fossil record, about how old is the Earth?
Question 5 of 10
What do paleontologists use mass spectrometers for?
Question 6 of 10
What's a transitional fossil?
Question 7 of 10
How old are the oldest human fossils?
Question 8 of 10
What's a living fossil?
Question 9 of 10
In February 2009, paleontologists unearthed a 60-million-year-old snake -- the largest on record. How much would it have weighed when it was living?
Question 10 of 10