Want to cut a sheet of paper in half? Pry open a tin can? Pull a cord to open a curtain? The objects you use to do these things are all the result of engineering.
4:46 · Technology
The very first engineers were solving problems more than a million years ago. Stone tools found in China and Kenya are the evidence. The problem? How to cut fruits, roots, vegetables, and meat. The solution? Strike stones together, causing sharp slivers of rock to break off. The stones with sharp edges were the tools. Today, these tools are called wedges.