Soldier ants prove evolution sometimes works in reverse

Washington DC (UPI) Mar 10, 2020

Turtle ant soldiers have evolved a unique defensive strategy. These gate guards use their comically large heads to block entrances to their nests. Some ants have round heads, like a manhole cover, ideal for blocking a small round entrance. Other ants, with square heads, congregate to form a blockade, like the wall of overlapping shields formed by Spartan armies. Turtle ant soldie