Residents across multiple states have been reporting strange clouds of fog with a 'chemical-like smell'.
Back in 2007, astronomers picked up an intense burst of energy that would spark a mystery that endures to this day.
Here we take a look back at our most popular general mystery stories from the last twelve months.
A police department in New Jersey reported that a drone it had sent up to investigate was unable to apprehend the objects.
Unidentified drones are now being seen with such regularity that even the FBI is struggling to solve the mystery.
Robert Klein has come forward to reveal an unexplained encounter with a UFO that occurred back in 2022.
The hapless animal was spotted several times wandering around with the yellow jacket fully zipped up.
The unmanned aerial vehicles have been spotted multiple times over three bases in the last week.
The exact origins of the Beluga whale, which turned up dead earlier this year, had long remained a mystery.
The unidentified object, which made local headline news, left witnesses scratching their heads.
Known as Skynet-1A, the satellite was launched in 1969 just a short time after Apollo 11 landed on the Moon.
A strange incident involving a glowing silt pond would go on to spark a mystery that would endure for five decades.
A skeleton unearthed in a small town in Belgium over 40 years ago has become the center of a long enduring mystery.
The object had been picked up on sonar and was thought to be the wreckage of the famed aviator's plane.
Something strange has been frequenting the skies over the state in recent years.
Researchers made the unexpected discovery while conducting an examination of the controversial remains.
For years, peculiar craters have been inexplicably appearing across Russia's remote Yamal Peninsula.
The Bristol Zoo Project recently captured a trail camera image of a strange creature with some unusual features.
The culprits seemingly broke into the store and spent time removing only the right-footed shoes from the boxes.
Eagle-eyed social media users had been discussing what could possibly be behind the partially hidden door.