Crossing Turtle

Dear friend,

Today I saw a turtle crossing the highway. A car almost hit it but the driver slowed down in time for the slow turtle. The turtle then stopped in the middle of the road. It just sat there in its shell. I passed by it slowly and when I left it was still there. I wonder what happened to it? It was so cute.

Sincerely,
Your friend

PS: Which one is a turtle and which is a tortoise? Are Ninja Turtles really turtles?