It was 50 years ago this month, on the evening of Sept. 30, 1960, that America met the Flintstones, television’s modern Stone Age family. That Friday night, kids couldn’t wait. Parents were ...

The Stone Age began about 2.5 million years ago, when inventive proto-humans first began to make stone tools. The bulk of it, and by far the longest period (so far) in human history, is known as ...