Walking on gravel
However, while they think they are outside the room they have just gone into, they have moved to where the real gravel starts. This means that as long as they keep sending the wearer into side rooms to check on things, the researchers can make it possible for the wearer to keep going down the path for hundreds of feet, always on gravel, even though the actual gravel only covers 30 feet in the lab.
July 2, 2012 4:00 AM PDT
Photo by: Daniel Terdiman/CNET
| Caption by: Daniel Terdiman
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