Millions of years ago, prehistoric predator and prey left massive prints in the ground of what is now Texas.

Mud and water flowing through the Paluxy River make it hard to see the dinosaur tracks. Video shared to Facebook on August 17 shows the river has shrunk in the last few weeks.

There are other tracks at Texas' Dinosaur Valley State Park, but few have seen these prints.

According to the U.S. Drought Monitor, the park is under an "abnormally dry" condition. It is the most severe level.

As of August 21, the video had been shared over 6,700 times.

One user commented that he was getting nervous because he was not looking over his shoulder while he was looking down at tracks.

There are two classes of dinosaurs, sauropods and theropods.

The brachiosaurus was one of the four-legged sauropods. The largest predator to have ever lived was theropods, who walked on two legs and covered the largest predator to have ever lived with them.

The park said in a separate post that more tracks are now visible because of the low river conditions. It's a great time to visit if you want to explore that part of the park.

Dinosaur Valley State Park is close to Fort Worth.

According to the website, the park has hiking, camping, fishing, and horseback riding.

Mastodon bones were found in Michigan. That is definitely not a horse.

Photos show a python being wrangled by police.

The fish in the photos are frightening. It is a rare animal.