Radscorpions roamed the Fallout universe, a giant mutation caused by too much radiation. We're not meant to see them in our universe for many years.
...but maybe they've already been here!
Scottish archaeologists have found the fossilised tracks of what they call a "man-sized scorpion" estimated as being more than 330 million years old. The "internationally important" sandstone discovery is the largest known walking trackway of a eurypterid, or any invertebrate animal.
The giant, six-legged water scorpion - Hibbertopterus - seems to have been two metres long (around 6ft) and a metre wide (about 3ft) - pretty much the size of the radscorpions terrorising the wastelands. This one apparently crawled over some damp sand during the Carboniferous period, and left three rows of crescent-shaped footprints and a drag mark from its long tail. It had been left alone since then, until Dr. Martin Whyte from the University of Sheffield happened upon the rock while he was out walking.
But it's not all good news - the trackway is apparently in a 'precarious' situation, according to Geoheritage Fife, who explain that the rock is actually in danger of falling off due to weather damage.
"Removing it and housing it in a museum would be prohibitively costly but moulding it in silicone rubber and making copies for educational and research purposes means that we can still see and research this huge creature's tracks in years to come."
If you'd hoped to find the co-ordinates for this find in your Pip-Boy 3000, I've got news for you. The scientific community think this discovery is something pretty special, and they're keeping the exact location a secret, to try and avoid sight-seers. So, if you want your fix of over-sized arthropods, it sounds like you're going to have to wait for Fallout: New Vegas. They'll be slightly more animated then, we hope.