aliens walk among us

Researchers at Harvard University have proposed the cryptoterrestrial hypothesis, a speculative theory suggesting that intelligent non-human beings could be living on or near Earth, potentially disguised as humans or concealed in underground or lunar locations.[1][2] This hypothesis emerged as an alternative explanation for unidentified anomalous phenomena (UAP), or UFOs, alongside conventional theories attributing them to either human technology or extraterrestrial visitors from distant space.[1]

The Cryptoterrestrial Hypothesis Explained

The cryptoterrestrial hypothesis, developed by Harvard researchers Tim Lomas and Brendan Case along with Montana Technological University professor Michael Masters, proposes that UAP sightings may reflect activities of non-human intelligence (NHI) that is "concealed in stealth" here on Earth and its surroundings.[4] Rather than assuming UFOs represent technology from advanced civilizations in other star systems, the researchers argue that intelligent beings responsible for UAP sightings could already exist on or near our planet.[1]

Proposed Origins and Forms

The Harvard paper explores several categories of what these "cryptoterrestrials" might be:[2]

Indigenous Cryptoterrestrials could be ape-like hominid descendants or descendants of unknown, intelligent dinosaurs that evolved on Earth.

Extratemporal Cryptoterrestrials may be humans from Earth's future who have traveled backward in time, explaining why beings in alien encounter reports are often described as looking identical to modern humans. Masters suggests that given evolutionary trends over the last 6 to 8 million years, future humans would likely have larger heads, smaller faces, and more advanced traits—characteristics commonly associated with typical "alien" depictions.[4]

Extraterrestrial Cryptoterrestrials could be beings from elsewhere in the cosmos who arrived on Earth and concealed themselves, potentially on the moon or underground.[2]

Magical Cryptoterrestrials represent entities less technological in nature, described as "fairies, elves, nymphs," and similar beings from mythology or folklore.[2]

Scientific Context and Limitations

The paper has not undergone peer review and is explicitly labeled as a "speculative thought piece" not officially affiliated with Harvard's Human Flourishing Program.[1] The researchers acknowledge that their hypothesis "is likely to be regarded sceptically by most scientists," but argue it deserves consideration with "epistemic humility and openness" given the empirical mysteries surrounding UAP sightings, particularly orbs appearing to enter or exit underground access points like volcanoes.[1]

It's important to note that a Pentagon report released in 2025 concluded there is no evidence that UAP sightings represent extraterrestrial technology, suggesting that mainstream government analysis has not validated the cryptoterrestrial or extraterrestrial explanations for these phenomena.[4]