The hearing aimed to "pull back the curtain on secret UAP research programs conducted by the U.S. government," but it was short on hard evidence.

The U.S. government has received more than 700 reports of unexplained phenomena but have found no proof of extraterrestrial life, the Pentagon’s UFO office confirmed at a Thursday briefing.

More than 20 reports of UFOs made over the past year have stumped the Defense Department and “merit further analysis.”