These mysterious circular-shaped patches of ground are starting to appear at sites all over the world.
Ecologists believe that they may have finally solved the mystery behind Namibia's mysterious circles.
These mysterious circular, grass-ringed patches are still leaving scientists scratching their heads.
Strange circular, grass-ringed patches have been discovered over hundreds of square kilometers.
The mysterious circles of the Namibian grasslands don't appear to have been caused by termites after all.