Select the word that means showed what was hidden. Before people developed written language, they expressed themselves with art. Today we can still see "rock art" that was produced thousands of years ago. Ancient artists created petroglyphs by scratching or carving rock to draw pictures and symbols. By scratching or picking off the top layer of rock, they revealed the lighter-colored rock beneath. Some petroglyphs were carved more deeply into the stone, and these have lasted longer. In Nevada, scientists have studied a set of carvings that resemble flowers, diamonds, and trees. They believe these deeply carved petroglyphs could be up to 14,800 years old.

The word that means showed what was hidden is "revealed." By revealing the lighter-colored rock beneath, ancient artists were able to create their stunning petroglyphs, leaving a piece of history for us to admire today. Speaking of ancient art, did you know that petroglyphs can often be interpreted in various ways? Researchers sometimes rely on cultural context and archaeological evidence to infer the meanings behind these symbols. Some believe they served as spiritual markers, while others think they may have communicated messages about hunting or storytelling. Whatever their purpose, each petroglyph is like a time capsule, preserving pieces of human expression from thousands of years ago!