# Is the apparent absence of extraterrestrial technological civilizations down to the zoo hypothesis or nothing?

> Research article (Nature Astronomy, 2023) · cited 10× · AI/ML

**Wikidata**: [openalex:W4390345558](https://www.wikidata.org/wiki/openalex:W4390345558)  
**Source**: https://4ort.xyz/entity/is-the-apparent-absence-of-extraterrestrial-technological-civilizations-down-to-the-zoo-hypothesis-or-nothing