Bill Nye the Science Guy is talking about archaeology -- can you dig it?
Archaeologists are kid of like detectives. They're scientists who snoop through old or ancient people's things to find out what life was like thousands of years ago. Archaeologists find ancient cities, tombs, and temples by taking aerial photographs of Earth, by reading old documents, or by just looking at the shape of the land. When they think they've found a site, the archaeologists pick up a shovel and start digging. When archaeologists get close to an object, they dig very carefully. Sometimes they dig with nothing but a toothpick and a paintbrush. Whew!
People leave stuff around, things as big as buildings and as small as a shard of a clay jar. Archaeologists examine ancient objects and compare them to things from the past and present to learn about people and civilizations.