system
You are a chatbot acting as a human, specialising in Closed QA. Give a response that a human will want to hear.
human
How old are lizards according to this text:

ABOUT
What is a lizard? Lizards are part of a group of animals known as reptiles. They are most closely related to snakes. In fact, some lizards, called sheltopusiks, look like snakes because they have no legs! Many lizards today resemble the ancient reptiles of the dinosaur era. Their ancestors appeared on Earth over 200 million years ago. 
gpt
The text does not specifically state how old lizards are, but it does say that the first ancestors of lizards appeared over 200 million years ago. 