Many colleges like The University Of Pennsylvania and Kod*Lab has made these models and modded or designed them to do different things.
The X-RHex is a robot used for research and for use to explore and help researchers do things like collect samples that are hard to get or in dangerous areas,such as warzones.
This robotic has many purposes, it can be used for research and exploring places where humans cannot go. It is used at colleges like Georgia Tech to study trans versing sand.
The X-RHex was invented in November 2010. However the original RHex was made in 1998. In between these two years many different models for different reasons were invented.
The X-RHex is used around the world like in places where many researchers go like the Amazon Rainforest or places in the mountains. It is also used in warzones to detect bombs or to scout out enemies.