Bob visits the Prehistoric Era at the Field Museum in Chicago

After a fun morning in Ancient Egypt, Bob decided to go back further in time. He entered the Prehistoric Era, when time began!

Bob discovered in the beginning there were only tiny life forms. These tiny lines in the rock are actually fossils.

        Bob learned that at one time most of the earth was covered with water. 

He wondered about the types of sea creatures that once swam here. 

Would they have eaten dogs?

Chicago was once covered with water too.    

A gigantic reef was home to
some of the first sea creatures

right where he was standing!       

Amazed, Bob moved further through time and discovered the first plants were much larger than what is on earth today.       

And so were the bugs!!

This is a gigantic Arthropod!

It lived around 354 - 290

million years ago!

Bob is staying out of it's way!!

Bob moved quickly away from the Huge creature and right in the path of a Parasauroloplus!

The Parasuroloplus might be a plant eater, but Bob wasn't going to take any chances! 

  

He jumped out of the giant's mouth and into a raptor's claws!

Lucky for Bob the raptor was looking the  other way .

Bob was able to jump out of his claws, but uh oh! 

Now Bob is being chased by a Herrerasaurus! Run Bob run!

 Bob finally found a friendly Dinosaur. 

The 3 horn, or Triceratops

gives him a ride safely away from the harmful dog eating

         dinosaurs! Thanks 3 horn!

Bob thanks the Triceratops and goes to the T. rex exhibit.

Bob feels sorry for whatever the T. rex is eating, but glad it's not eating him!

One last photo with the famous T. rex Sue!

Wow! What a day! Bob learned a lot about the prehistoric era. He hopes you learned something too.

Now Bob is exhausted. It's time for a break.

  That's refreshing!  

Bob is ready to see the famous animal dioramas.