Ancient termite megapolis as large as Britain found in Brazil
cnn.com
cnn.com
"... two hundred million of these mounds covering an area similar to the UK. This means that 10 km^3 (about 4000 great pyramids of Giza) of soil have been excavated, making this the greatest known example of ecosystem engineering by an insect..."
https://www.youtube.com/watch?v=uXlS48mptbM
And the paper:
https://www.cell.com/current-biology/fulltext/S0960-9822(18)...