Prehistoric times are often called the Stone Age. That’s because most tools and weapons were made of rocks. Typically, people used flint (sedimentary) and obsidian (igneous). These rocks chip easily into sharp points and flakes. Around 3500 B.C., people started mixing together the elements copper and tin to make bronze. That’s when the Bronze Age began. | Rocks for Tools and Tombs | Kids Discover
There's nothing better on a cold day than a warm bowl of soup. But when did our ancestors first brew up this tasty broth? New archaeological evidence suggests that soup making could be tens of thousands of years old.