Wolves can dig tunnels through two meters of soil
Animals
A gray wolf once staged a daring escape from a South Korean zoo by tunneling through two meters of solid earth in a single night.
Neukgu, a 35-kilogram male wolf, proved that even modern enclosures are no match for ancient survival instincts. To escape his habitat at the Daejeon zoo, he utilized a bite force of 1,200 Newtons—strong enough to crush bone—to tear through the substrate and dig a two-meter tunnel beneath a heavy chain-link fence.