When and why did people start living in cities?

50 on a scale of one to ten, how cute is this dog? (for a science project i need data)

What drifted apart millions of years ago to create two different worlds

Three of the following infractions will result in your drivers license being suspended. which will cause it to be revoked? a. racing on the highway b. failing to stop for a school bus c. failing to pay child support d. refusing a breath test