Rob Nelson Bio
Where did this well known symbol come from?
The Origin of the Infinity Symbol
In order to further explore a cave in San Antonio, Rob Nelson crawls through incredible tight caverns. Don’t worry though, he’s only a little claustrophobic.
Rob Crawls Through Caverns
There’s a mysterious underwater rock circle that supposedly has carvings in it.
Rob's gear malfunctioned underwater.
How Dangerous was the Lake Michigan Dive?
Go with Rob behind the scenes to see where parts of the show are shot!
Secrets of the Underground Set Tour
Gungywamp was one of Rob’s favorite spots during this season of Secrets of the Underground!
Gungywamp May Provide Proof of Europeans in the Americas Before Columbus
The Great Serpent Mound is a 1,348-foot-long prehistoric effigy mound in Ohio. Scientists are sure what it’s purpose was.
What is Buried Under Serpent Mound?
A collection of dinosaur marks can be found near Denver. Some of these markings are believed to be part of a mating ritual that can still be seen in modern bird species.
Dinosaurs Left Mating Ritual Marks in Colorado
Enormous dinosaurs and teeny birds have a lot more in common than you might think!
What do Plovers and Dinosaurs Have in Common?
First, scientists like to date the rock in which the fossil is on. Radiometric dating is a technique used to date materials such as rocks or carbon.
How Do Palenologists Date Fossils?
What is Pi and where did its symbol come from?
Where Did Pi Come From?
The cave in central Texas is home to more than 10,000 prehistoric fossils.
This Cave in Texas is Full of Ice Age Fossils
A single bill contains dozes of symbols.
What Symbols are on American Money?
The official reports claim that all 57 workers died from Cholera, but something more sinister may have occurred.
The Mysterious Disappearance of Train Workers in Pennsylvania
Funny enough, these symbols were used to classify plants before classifying humans and animals.
Where Did the Female and Male Symbols Originate?
In this digital exclusive, Rob Nelson shares extra details about his time spent in this cave full of prehistoric fossils.
What Was Exploring Friesenhahn Cave Like?