"Unidentified Anomalous Phenomena" (UAP) — bureaucracy-speak for UFOs, basically — "may reflect activities of intelligent beings concealed in stealth here on Earth (e.g., underground), and/or its near environs (e.g., the Moon), and/or even 'walking among us' (e.g., passing as humans)."
I want whatever they're smoking at Harvard
https://uk.news.yahoo.com/harvard-scientists-may-unknown-technologically-150917239.html?guccounter=1