Today, people display art in special places—like museums. Ancient people put their art is special places, too. Scientists have discovered that some cave paintings were done in locations where there are strong echoes. They even found that in places where there are ancient paintings of horses that the echoes sound like hoof beats! These hand stencils in Patagonia, Argentina, are about 10,000 years old. What do you think it would sound like if you clapped your hands nearby? (sunsinger/ Shutterstock) Read More