Decades After Landing on Mars, We May Find Proof of Past Life
After 25 years of rovers landing on Mars, many are looking forward to the next chapter of Mars exploration, which may include excavating deep into the red planet. In July 1997, NASA’s Pathfinder landed on Mars and began its mission to demonstrate how a robotic rover would land on the red planet.
Using an innovative design, the rover landed on Mars with a parachute and a series of giant airbags to cushion its blow. The Carl Sagan memorial station and the Sojourner Rover outlived their projected lifespan, and in the years following sent magnificent images back to Earth.
The lander returned more than 16,500 images and the rover sent back 550 more, in addition to chemical analyses of rocks, soil, and data on wind and weather. The final transmission from the Mars Pathfinder was on September 27, 1997, but the data it provided helped scientists to conclude Mars was once wet and warm, and rounded rocks on the surface indicate they may have been worn down by running water, and if there was water, there could have been life.
Flash forward to today, NASA’s Perseverance Rover, on the red planet since February of 2021, is tasked with finding past or present life and seeing if humans could one day explore or colonize Mars.
Perseverance is collecting samples to determine if they contain any fossils of ancient Martians. But a new study led by Alexander Pavlov, a space scientist at NASA, says they might have to dig a lot deeper.
Pavlov argues that amino acids could be the best evidence of any past life on Mars, but after millions of years of radiation, all those amino acids on the surface would have been destroyed, writing, “Our experimental results suggest serious challenges for the search of ancient amino acids and other potential organic biosignatures in the top 2m of the Martian surface.” Two meters, or roughly seven feet, may not sound like much, but Perseverance can only dig a few inches.
“Microcraters are common on Mars,” Pavlov told Vice. “Small impactors can excavate rocks from several meters of depth. Cosmic rays are significantly reduced by two-meter depth into a rock and do not penetrate at all below four meters. Therefore, an ejecta from such depths would have a small exposure time to cosmic rays and thus, may contain the primordial unaltered amino acids from billions of years ago.”
In 25 years of humans studying the surface of Mars we have learned so much, but as Pavlov concluded in his study, “We have only scratched the surface of this problem.”
With every problem comes the opportunity to figure out a solution and perhaps this will help us find life on Mars.
Science Says Wormhole Travel is Real; Can We Use it for Exotic Propulsion?
Once believed to be sci-fi fantasy, new research suggests we may be able to achieve interstellar travel using wormholes as shortcuts through spacetime.
Recently, physicist Pascal Koiran at Ecole Normale Supérieure de Lyon in France published a pre-print study detailing the potential that matter could enter the event horizon of a black hole and pass through a wormhole and exit out the other end intact. Though still highly theoretical, wormholes are believed to be incredibly unstable as they exist as a tunnel between a black hole and a white hole in another part of the universe.
But because nothing, including light, can escape a black hole once it has crossed its event horizon, physicists have believed that matter would need to somehow enter the wormhole outside of the event horizon in order to safely pass through.
Dr. Simeon Hein, director of the Institute for Resonance, explains the mind-bending physics of this theoretical phenomenon.
“So the idea people were beginning to think, ‘well, what happens to the matter and energy that gets condensed and condensed into a black hole?’” Dr. Hein said. “The idea was that it had to be ejected somewhere else beyond that point in space. And that became the idea of a wormhole to another point in spacetime where all the matter and energy would be ejected from the black hole to conserve this idea of symmetry which is the foundation of modern physics — that there’s kind of a basic symmetry to the universe. And so the other side of the wormhole is a white hole.”
If wormholes have been conceptualized by theoretical physics for decades, what is so novel about the mathematics proposed in this recent paper?
“Physicist Pascal Koiran in France, he looked at another way to measure what’s going on in the mathematics of black holes. He used a different metric than Einstein would have used because back in the 1950s, two different physicists, David Finkelstein and Sir Arthur Eddington of the Royal Society in the UK, both proposed that there was this point of no return in the black hole where once you got past a certain point, it was no longer symmetrical, you couldn’t leave anymore, the so-called Schwarzschild radius,” Dr. Hein said.
“Past this point, you would just keep getting more compressed and you would have to go through the wormhole. So, using the so-called Finkelstein-Eddington metric — and a metric, by the way, is kind of the idea of a standard unit of measurement, a standard unit of anything: speed, direction, or position — using this measurement Koiran was able to show that it’s actually more stable than you think; that there is some stability even at the highest level of gravitational compression in a black hole. This would suggest that moving through it, maybe something really would survive.”
