Hello Readers, Writers, Teachers, and Children! I’d like to introduce a new series of educational articles that I call Historical Geographic. In this series, we
Prehistoric Times The Archean (ar-KEE-uhn) Period started about 4 billion years ago and lasted until about 2.5 billion years ago. That’s a looooooooot of zeroes!
Hello Reader, Writers, Teachers, and Children! Our earth is somewhere around 4.5 billion years old. And living things have existed on it for maybe 3.5