Researchers at Harvard University and Montana Technological University speculated that an unidentified, technologically advanced population could be living among humans secretly on Earth.

In a new paper, the team hypothesized that sightings of UFOs (or UAP, unidentified anomalous phenomena) "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)."

The researchers admitted that their research was "likely to be regarded skeptically by most scientists," but urged the scientific community to consider their claim "in a spirit of epistemic humility and openness."

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In the paper, the scientists explained the hypothesis for aliens on Earth.

The researchers said that they believe that "remnant forms," which are an ancient, highly advanced human civilization, are walking among humans on earth. 

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The research also shared the possible existence of a non-human underground civilization that may be "descendants of unknown, intelligent dinosaurs."

Third there could be hidden occupants, likened to earthbound angels or fairies, on Earth that have traveled to Earth.

The research papers quotes former House Representative Mike Gallagher, who suggested last year that one explanation for the UFO sightings might be "an ancient civilization that’s just been hiding here, for all this time, and is suddenly showing itself right now.

Gallagher's comment came after UFO whistleblower David Grusch testified under oath that his life was threatened and he was instructed to keep quiet about a secret government-run crashed UFO retrieval program. 

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Grusch's explosive testimony in July 2023 claimed that the U.S. government "absolutely" has UFO tech and "biologics" of "non-human origins" since the 1930s and knows the exact locations where they're being held.

Passengers on board a city transit bus in Rhode Island got more than they bargained for and an extra passenger on Monday when a deer crashed through the windshield as the driver calmly continued on the route.

The incident, which happened shortly after 3 p.m. on Monday, was captured on video by the Rhode Island Public Transit Authority (RIPTA). It shows the deer leaping from the street straight into the windshield of the bus.

"On Monday, a deer unexpectedly ran into a RIPTA bus traveling on Warwick Avenue in the City of Warwick,"  Christopher Durand, RIPTA interim CEO said in a statement to Fox News Digital. 

Police said six passengers were on board the bus and of the six, two were treated at a local hospital for injuries sustained from the shattered windshield. 

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Despite the unwanted passenger, the video shows that the driver was able to calmly keep driving till he could pull over safely to evaluate the situation. 

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The deer did not survive the crash and succumbed to its injuries, according to local station WPRI. 

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Durand praised the bus driver for his swift actions. 

"I want to commend our RIPTA bus driver, Leocadio Hernandez, for his exemplary response to this unique situation. His exceptional alertness and composure under pressure ensured the safety of all passengers. This incident underscores the dedication and professionalism of our drivers in maintaining the highest standards of safety and care for our community," Durand said. 

Fox News Digital reached out to the Warwick Police Department for comment.