When explorers or scientists reach an empty place, they can often tell that people once lived there long ago, even with no one left to ask. They look for clues that nature could not have made on its own. Straight rows of trees or plants are one of the strongest signs, because wild seeds fall at random and never grow in tidy lines — only a farmer plants an orchard that way. Other clues include the low remains of stone walls, broken pieces of pot or pottery, flattened ground where buildings once stood, and fruit trees still bearing food far from any wild forest. Scientists who study these traces are called archaeologists, and they treat a site like a puzzle, reading each clue to reconstruct a vanished way of life. What they cannot learn from clues alone is a person’s name or exact thoughts — those are lost. But from the patient reading of evidence, a whole community can step back out of the silence, hundreds of years after its people are gone.

No right or wrong — close the screen and tell someone nearby what happened in this part. Can’t find anyone? Tell yourself out loud. The moment you teach it, you truly understand it.