When they discover dinosaur remains, how do scientists know whether they found a male or a female? Would you believe it all comes down to one bone?
WHAT'S INSIDE: GEOLOGY
- Geologic Processes
- Geologic Time Scale
Archaeology is the study of humanity's material remains -- even a piece of an ancient pot can tell us a lot about the past. But how do archaeologists make sense of these relics?
When it comes to fossils, specimens like Sue the Tyrannosaurus rex grab much of the attention. And while Sue is a staggering 67 million years old, she's a new kid on the block, compared to some of the oldest fossils ever found. What's older than Sue?