Modern humans have existed for around 300,000 years, and in all the time we've been here, we've made a lot of things. In the early days, homo sapiens fashioned tools from flint and other materials, ...

On Dec. 16, 1947, the future began with the invention of the transistor. A lab notebook indicates that researchers at Bell Telephone Laboratories first got the thing to work on this day 75 years ago.