Is there evidence aliens have visited Earth? Here's what's come out of US congress hearings on 'unidentified aerial phenomena'

By Steven Tingay, John Curtin Distinguished Professor (Radio Astronomy), Curtin University

The United States Congress recently held a hearing into US government information pertaining to “unidentified aerial phenomena” (UAPs).

The last investigation of this kind happened more than 50 years ago, as part of a US Air Force investigation called Project Blue Book, which examined reported sightings of unidentified flying objects (note the change in name).

The current hearings are the result of a…

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