Do you believe in aliens? About 54% of Americans certainly do, just as many think that the aliens have been down here to visit us. There have been nearly 200 separate reports of UFOs, but they’re exactly as defined unidentified flying objects. So we don’t know what they are doesn’t automatically mean they belong to ET. What hard evidence is there for aliens either down here on earth or out in the cosmos.
According to Britain’s first astronaut Helen Sharman, there are billions of stars out there. It means there must be all sorts of different forms of life. In the 60s, astronomer Frank drake turbocharged the modern search for extraterrestrial life. He came up with the drake equation, which predicted millions of civilizations out there among the stars.
In the 70s, scientists sent radio signals from earth into space. They started as simple beats then became more complex, like info about DNA. Another theory is that the aliens don’t live long enough or develop enough to touch us.
6 surprising evidence of alien existence
When people talk about “aliens,” they mean living things that make their homes on a planet other than Earth. In the vacuum of a space simulator, life forms have been flourishing for years without oxygen. There are more habitable Earth-mass planets in the observable volume of the universe than there are grains of sand on all the beaches on Earth.
The discovery of just one bacteria on Mars would indicate that the whole chain of evolutions cosmic, chemical, and biological is at work everywhere. In that case, the creation of life anywhere in the universe would be more the rule than the exception.
In 1959, the journal Nature published a paper that found satellite dishes, basically electromagnetic wave antennas. They had become sensitive enough that they might pick up alien communications if pointed in the right place. Let’s find the proofs of the alien’s existence.
1. Crop circles
Most common in the UK, they appear overnight in fields of wheat and barley. The stalks aren’t cut, but they are laid flat over large areas to create beautiful and complicated geometric patterns when you look down from above. What could cause such magnificently mysterious shapes to suddenly and miraculously appear? It must be aliens! If it is, then they’ve only really been visiting since the 1970s. They have a distinct preference for crop fields easily accessible by Road. Yet, despite the vast surface of earth available to them, they keep choosing to come back to the UK.
They could have been made by people sneaking out in the middle of the night to fool us all. In 1991 two men from Winchester confessed to having created many of the British crop circles. That has been documented over the years. But they haven’t laid claim to all of them. So there is still a chance that aliens are involved. However, the lack of any other accompanying evidence of extraterrestrials makes it a lot more likely that they’re all the product of copy hoaxers.
Most of these supposedly mysterious alien structures can be explained by relatively simple natural or known phenomena. If they’re not hoaxes, they could be innovations in aerospace engineering or a simply normal flying machine seen at a weird angle. All of these options are more probable than invoking an entirely new extraterrestrial civilization. So far, it’s not looking so good for the committed Alien Hunter, but all is not lost. Some phenomena have evaded rational explanations and could conceivably be evidence of alien life out there in the cosmos.
2. Big ear telescope
Back in 1977, the aptly named Big Ear telescope in Ohio was used to listen to radio signals coming from the stars. This careful listening has been the basis of SETI (Search For Extraterrestrial Intelligence) based on the theory that an advanced alien civilization will like us to be intentionally or accidentally beaming radio signals out into space. Some of the world’s most powerful radio telescopes have been used in the search since 1960. But on the whole, they’ve turned up nothing note that is except at Big Ear in 1977.
On August the 15th, the telescope picked up an intense flash of radio energy in the frequency that astronomers would expect from an intelligent source. It seemed to be coming from the constellation of Sagittarius and registering on the paper readout to over 30 times the background noise. Astronomer Jerry Ehman circled it and wrote “Wow” in the margin. It’s now known among the SETI community as the WoW signal.
Even 40 years on, we still don’t know exactly what caused it. The problem is that the radio show hasn’t been heard since, despite astronomers searching over 50 times. Without the chance to make repeat observations, there’s simply no way of saying if the WoW signal was the first radio broadcast from an alien race or simply a product of natural cosmic processes.
Airman’s Wow signal is that the only space mystery that could be explained by ET, though. In 2015, citizen science exoplanet hunters spotted a star, which showed unusual fluctuations in its brightness. That was not easily explained by the orbiting of planets.
3. Tabby’s star
Boyajian’s Star, previously referred to as Tabby’s star is named after the astrophysicist who first studied its inexplicable behavior. It’s a bit larger than the sun and is about 1300 light-years away. It’s the most unusual dimming of a star ever observed. The dimming is much too substantial to be caused by an orbiting planet. Because even planets as giant as the biggest ones in the solar system would only make a tiny blip in the brightness of Boyajian’s star.
As it’s affectionately known, Tabby’s star is occasionally dimmed by up to 22 percent of its normal brightness. Presumably by something passing in front and obscuring part of it. But scientists aren’t sure exactly what that something is some suggest comet fragments. It’s unlikely that so many would-be around to block 22 percent of the light.
4. Dyson swarm
Another option is a Dyson swarm which is sadly not a fleet of sentient vacuum cleaners. Instead, it’s a theoretical alien megastructure designed to capture as much of a star’s energy as possible. Placing a solar panel network around a star in three dimensions would intersect its radiation in all directions. Thus, it provides almost limitless energy for the extraterrestrials and blocking the light to any outside observers like us.
The lip from weird star flickers to highly advanced alien civilizations is a big one. Scientists are understandably skeptical, but until an alternative explanation can be found, the ET Theory has to stay on the table. Unfortunately, that’s about the best we can do for extraterrestrial evidence for now. It remains to be seen whether it amongst all those hoaxes and out there when it does come along.
5. Drake equation
The Drake Equation breaks down the Milky Way into numbers to estimate how many communicating alien civilizations might be out there. The Drake Equation considers the following factors:
- The average rate of star formation.
- The fraction of those stars with planets.
- The average number of potentially habitable planets around those stars.
- The fraction of those planets which can support life.
- The fraction that DO develop life.
- The fraction of those with life that evolved to be intelligent and civilized.
- The fraction of civilized, intelligent life that have developed communications.
- And finally, the length of time.
It takes those intelligent aliens to transmit a signal into space. This was all designed to estimate the number of developed, intelligent, communicative civilizations that are out there waiting for us to find. But obviously, there are some problems with this formula.
It’s taking many unknowns and throwing them into an equation that can give a huge range of probabilities. Even Drake didn’t intend for this equation to be a definitive answer as to whether or not aliens with radio dishes are out there. Instead, it’s supposed to help us start the conversation about the sheer number of planets which could have life.
Interestingly as time goes on and advances in astronomy come in thick and fast, we’re gradually refining our estimates on how many exoplanets are out there in the galaxy.
NASA’s Kepler space telescope is even finding worlds orbiting within their star’s “habitable zones” that are possibly cozy places for life to evolve. The upshot is that the more actual data that we can throw into this equation, the more compelling it becomes. But there are other factors that the Drake Equation doesn’t consider, one of them being:
- How do non-living chemicals turn into living, breathing creatures that eventually evolve to build radio transmitters?
6. Scharf-Cronin equation
Now, another equation uses planetary chemistry to calculate the odds that life could form on a planet at all! It’s almost like this new Scharf-Cronin equation is one of the missing puzzle pieces from the Drake equation!
The Scharf-Cronin uses the total number of building blocks on a given planet. It multiplies it by the fraction of building blocks needed per “organism,” multiply that by the availability of those building blocks during the time they exist. Then, the probability of the assembly of those blocks in a given time multiplies that by time overall.
From that, it can determine a rough estimate of the odds that an origin-of-life event would happen on a planet! Turning non-living chemicals into functioning biology is called “abiogenesis.” And this new equation provides new microscopic areas to study beyond the Drake Equation.
Without the Drake and now the Scharf-Cronin equations, we wouldn’t have a model to start within, finding out how many planets might have a life out there. This is the bleeding edge of science in some ways. Mathematically speaking, it probably does, maybe not Drake-level communicative life. Perhaps it’s microorganisms, or maybe plants!
In the end, the 1959 paper by Cocconi and Morrison put it best in its very last line, “The probability of success is difficult to estimate, but if we never search, the chance of success is zero.”
- Top 20 Exoplanets That Can Support Life
- Why Do Meteorites Fall To Earth Surface?
- Is Universe Expanding Faster Than Light Speed?
Frank, Adam, “A new frontier is opening in the search for extraterrestrial life.”
Davies, Paul, “Are We Alone in the Universe?”.
Pickrell, John, “Top 10: Controversial pieces of evidence for extraterrestrial life”.
Overbye, Dennis, “As Ranks of Goldilocks Planets Grow, Astronomers Consider What’s Next”.
Domagal-Goldman, Shawn, “Would Contact with Extraterrestrials Benefit or Harm Humanity?
Weaver, Rheyanne, “Ruminations on other worlds”.
De Freytas-Tamura, Kimiko, “Winston Churchill Wrote of Alien Life in a Lost Essay”.