Story perspectives

Ancient Sloth-Made Tunnels Discovered in Brazil's Ice Age

9/15/2025

30 7

Summary

Story summary

Ancient tunnels in Brazil's Grande do Sul region, measuring 1.8 meters high and 600 meters long, are not human-made.
Geology professor Heinrich Theodor Frank discovered these tunnels, likely created by giant extinct ground sloths.
A 2018 study suggests sloths used their large claws to dig tunnels for shelter.
Frank emphasized that no geological process could produce tunnels with claw marks.
Findings indicate humans hunted sloths, revealing new insights into Ice Age interactions.

1 of 1

Story summary

Ancient tunnels in Brazil's Grande do Sul region, measuring 1.8 meters high and 600 meters long, are not human-made.
Geology professor Heinrich Theodor Frank discovered these tunnels, likely created by giant extinct ground sloths.
A 2018 study suggests sloths used their large claws to dig tunnels for shelter.
Frank emphasized that no geological process could produce tunnels with claw marks.
Findings indicate humans hunted sloths, revealing new insights into Ice Age interactions.