NASA scientists have been searching for extraterrestrial life for a long time. Moreover, the space agency has never denied it, and that is enough to discuss the possibility of the existence of extraterrestrial beings outside of Earth in any form, from micro to macro.
The controversy arose when a few years ago James L. Green, retired NASA chief scientist, talked about Mars and the alleged extraterrestrial life on this planet.
Before moving on to Dr. Green’s statement, it should be noted that NASA has acknowledged that there may have been interference from extraterrestrial civilizations in Earth’s history. In 2014, NASA published a book called Archaeology, Anthropology and Interstellar Space which looks at extraterrestrial interference in human history. He notes the possibility that some rock art on Earth may be of extraterrestrial origin. It was edited by Douglas Wakoh, director of the Division of Search for Extraterrestrial Intelligence (SETI).
Moreover, in fact, it would only take 10,000 years for the traces of human presence to disappear from the planet, which is a very short period compared to the age of the Earth.
If such a civilization had once existed, its traces wouldn’t be so obvious – given that Earth’s 4+ billion years is a wide enough range for the evolution (and extinction) of intelligent life.
In 2019, retired NASA chief scientist Dr. Jim Green made several statements that sparked considerable controversy. The expert believes that, most likely, the European Space Agency (ESA) has already discovered evidence of extraterrestrial life on Mars. The fact is, Dr. Green is convinced, that humanity is simply not ready for such information.
NASA Chief Scientist Jim Green. Image credit: NASA
In the summer of 2020, two rovers from NASA and the European Space Agency (ESA) will travel to Mars to drill horizontally into rock, hoping to find evidence of living organisms.
He assured that the proofs of an extraterrestrial existence on Mars have been obtained, at the latest, in mid-2021. However, it will take humanity much longer to come to terms with the idea that life still exists outside of Earth.
Has Perseverance found life on the surface of Mars?
NASA’s Perseverance rover is currently exploring two very different geological sites at the bottom of Jezero Crater since landing on February 18, 2021. The rover has found new evidence of ancient hot magmas and water. He also discovered ancient organic molecules preserved in rocks and dust.
The Perseverance rover used the Raman & Luminescence Instrument for Organic and Chemical Materials (SHERLOC) to detect them. Organic materials are an intriguing discovery because they are the building blocks of life.
However, both biological and non-biological processes can create organic substances. Scientists have yet to determine whether or not these particular organic substances come from organisms that have already lived. Also, this isn’t the first time the rover has detected organic matter on Mars.
Has NASA ever found aliens on Mars?
Ahead of launch, Dr Green said: These missions are humanity’s best chance to answer the question, “Are we alone in the universe?” Jim Green was instrumental in both missions. He added that “there is a real possibility that one or both will be successful.”
However, this will have far-reaching consequences, and he believes the Earth is not ready for this.
“It will be a revolution. This will launch a whole new way of thinking. I don’t think we’re ready for results like that,” Green said.
A study published in 2020 shows that planets previously thought to be uninhabitable may have once had conditions suitable for life. Researchers discovered the chemical phosphine in the dense atmosphere of Venus.
After careful analysis, scientists claim that the only explanation for the source of this chemical is something living.
One of the promising signs of life on Mars, says Dr Green, is that every summer the amount of methane on the planet’s surface increases dramatically. The Curiosity rover on Mars has also detected molecular oxygen, which increases by up to 30% each spring and summer before decreasing again in the fall.
“It tells us that life can be found deep below the surface in the summer. The heat of the ground and therefore is weakened so that methane can infiltrate. We have all kinds of indirect observations that show there may be microbial life on Mars as well,” he explained.
It’s likely that life on Mars and Venus could still be sustained underground, and in order to make the surface habitable, Dr Green has proposed terraforming both planets.
According to him, it is possible to terraform Mars by placing a gigantic magnetic shield between the planet and the Sun, which would prevent the Sun from stripping it of its atmosphere, thus allowing the planet to retain more heat and warm the climate for make it habitable.