This story shows that ants are a bit considerate to their colleagues when it comes to sickness. Unlike my school friends, they'll keep themselves away from the rest of the workers and prevent diseases from spreading. https://www.newscientist.com/article/2186140-sick-ants-stay-clear-of-their-co-workers-to-stop-disease-spreading/

These ants are rather creepy. Formica archboldi ants keep the dismembered limbs and decapitated heads of their prey. The ants spray their victims with formic acid to immobilize them and then they're dragged back to the nest to be dismembered. https://www.smithsonianmag.com/smart-news/these-ants-immobilize-prey-acid-drag-back-nest-dismemberment-180970870/

An interesting study on the interactions of ants and plants. The study looks at how ants and plants use each other for resources. Who gets the best deal out the relationship? https://www.eurekalert.org/pub_releases/2018-11/fm-hpe110718.php