The number of incidents in which humans have been abducted or come into contact with extraterrestrials has increased along with the popularity of the UFO phenomenon in recent years.
There are many instances that are essentially hoaxes, but there are some instances that have caught the attention of scholars. Only a very small percentage of alien abductions or interactions are believed to be completely real.
Witnesses claim that during their encounters with these entities, they were shown a variety of holograms and projections that included important information about the Earth. Some people who claim to have interacted with these aliens claim that they were here on Earth hundreds of thousands or even millions of years ago. 
According to this belief, these aliens are our ancestors who left Earth and carried on evolving in distant reaches of the universe. Since we do not yet have the technology to understand them, strange occurrences like teleportation and time travel continue to be a mystery to civilization.
If we look for answers to some of the most important questions in life (Who are we? Where did we come from? We should start by delving within ourselves to find out who we genuinely are (where are we going?). And our DNA may contain the first clues.
The remaining 90% of human DNA is still unknown to us since less than 10% of it serves a functional purpose. What do you think about this theory? Do you believe that to be plausible?
Did another advanced species exist on Earth before humans?
Our Milky Way galaxy contains tens of billions of potentially habitable planets, but we have no idea whether we’re alone. For now Earth is the only world known to harbor life, and among all the living things on our planet we assume Homo sapiens is the only species ever to have developed advanced technology.
But maybe that’s assuming too much.
In a mind-bending new paper entitled “The Silurian Hypothesis” — a reference to an ancient race of brainy reptiles featured in the British science fiction show “Doctor Who” — scientists at NASA’s Goddard Institute for Space Studies and the University of Rochester take a critical look at the scientific evidence that ours is the only advanced civilization ever to have existed on our planet.
“Do we really know we were the first technological species on Earth?” asks Adam Frank, a professor of physics and astronomy at Rochester and a co-author of the paper. “We’ve had an industrial society for only about 300 years, but there’s been complex life on land for nearly 400 million years.”
If humans went extinct today, Frank says, any future civilization that might arise on Earth millions of years hence might find it hard to recognize traces of human civilization. By the same token, if some earlier civilization existed on Earth millions of years ago, we might have trouble finding evidence of it.
In search of lizard people
The discovery of physical artifacts would certainly be the most dramatic evidence of a Silurian-style civilization on Earth, but Frank doubts we’ll ever find anything of the sort.
“Our cities cover less than one percent of the surface,” he says. Any comparable cities from an earlier civilization would be easy for modern-day paleontologists to miss. And no one should count on finding a Jurassic iPhone; it wouldn’t last millions of years, Gorilla Glass or no.
Finding fossilized bones is a slightly better bet, but if another advanced species walked the Earth millions of years ago — if they walked — it would be easy to overlook their fossilized skeletons — if they had skeletons. Modern humans have been around for just 100,000 years, a thin sliver of time within the vast and spotty fossil record.
For these reasons, Frank and Gavin Schmidt, a climatologist at Goddard and the paper’s co-author, focus on the possibility of finding chemical relics of an ancient terrestrial civilization.
Using human technology as their guide, Schmidt and Frank suggest zeroing in on plastics and other long-lived synthetic molecules as well as radioactive fallout (in case factions of ancient lizard people waged atomic warfare). In our case, technological development has been accompanied by widespread extinctions and rapid environmental changes, so those are red flags as well.
After reviewing several suspiciously abrupt geologic events of the past 380 million years, the researchers conclude that none of them clearly fit a technological profile. Frank calls for more research, such as studying how modern industrial chemicals persist in ocean sediments and then seeing if we can find traces of similar chemicals in the geologic record.
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