Spy Agencies Turn to Scientists as They Wrestle With Mysteries

American intelligence agencies are tapping outside expertise as they wrestle with mysteries like the coronavirus and U.F.O.s that are as much about science as they are about espionage.

Inside the U.F.O. Report

What we’ve learned from recent unclassified information on unidentified aerial phenomena.

U.S. Has No Explanation for Unidentified Objects and Stops Short of Ruling Out Aliens

A new government report is likely to fuel theories about unexplained aerial phenomena.

Opinion | I Created ‘The X-Files.’ Here’s Why I’m Skeptical of the New U.F.O. Report.

“Could the government actually be telling the truth? Or is the truth above top secret?” asks “X-Files” creator Chris Carter.

The Truth Has Not Always Been Out There

Rather than explaining when U.F.O. sightings were really just top-secret planes, the government has sometimes allowed public eagerness about the possibility of aliens to take hold.

The Truth Has Not Always Been Out There

Rather than explaining when U.F.O. sightings were really just top-secret planes, the government has sometimes allowed public eagerness about the possibility of aliens to take hold.

Prepare Yourself for Little Green Men

If you can’t wait to read the U.S. government’s report about U.F.O.s, try one of these seven books.

Opinion | U.F.O.s and the Search for Alien Life

Readers speculate about how extraterrestrial beings would view our world. Also: The Wuhan lab; the C.D.C. and mild infections.

Opinion | E.T., Phone Me!

I asked David Duchovny the truth about what is out there.

U.S. Finds No Evidence of Alien Technology in Flying Objects, but Can’t Rule It Out, Either

A new report concedes that much about the observed phenomena remains difficult to explain, including their acceleration, as well as ability to change direction and submerge.

Why Are We All Talking About U.F.O.s Right Now?

U.F.O.s were once a taboo topic for the U.S. government, but not anymore. A long anticipated report was released.

Opinion | I’m a Physicist Who Searches for Aliens. U.F.O.s Don’t Impress Me.

There are good reasons to believe in extraterrestrial intelligence, but this is not one of them.

Harry Reid: What We Believe About U.F.O.s

We still don’t know what they are — but we may be close to finding out.