Researchers think that ground sloths could have been pushed out by an oncoming ice age, or competition with other species, maybe humans, who arrived in the region around the time most of the sloths went extinct.
Forskare tror att marksengångare kan ha tvingats bort av en kommande istid, eller konkurrens från andra arter, kanske människor, som anlände till samma region ungefär samtidigt som de flesta sengångare dog ut.