That ant colony belongs to an invasive species of fire ant (called Red Imported Fire Ants or RIFAs) which cause more harm to the local environment than good. Researchers are experimenting with extremely high temperatures as a means to dispose of invasive insect species and, just so you know, molten aluminum is VERY HOT.
Not saying this is the best way to do it, but these folks are doing a service for the local environment and they got a beautiful piece of art for their efforts.
It’s also good for Science because we get to see what the inside of a fire ant nest look like. That’s really cool.