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Aliens could spot humans on Earth by clocking 12 signs – and top of the list exposes us to E.T 12,000 lightyears away
ALIENS could discover humans on Earth by spotting one of 12 signs, scientists say.
Topping the list is a clue that could be seen by extraterrestrials from a mammoth 12,000 lightyears away.
The list was created by alien-hunting scientists at the SETI Institute. SETI stands for “Search for Extraterrestrial Intelligence.”
They created a list of “technosignatures”, which are signs that could give humans away across the vast distances of space.
Topping the list was a type of radio signal called planetary radar.
This is when we send a powerful beam of radio waves out into space – and wait for it to bounce back to Earth from an object, like an alien planet.
When we get the reflected radio echo, it can be analysed to find out more about the object that the beam hit.
Scientists say that these powerful radio signals would be one of the best signs for aliens to look out for.
That’s because planetary radar travels over vast distances – exposing us at far greater distances than, say, city lights on Earth.
These are visible at distances of up to 10,000 lightyears away – and potentially even 12,000 lightyears.
For context, a single lightyear is equivalent to 5.88 trillion miles. Mars is just 0.00002 lightyears away, on average.
“Our goal with this project was to bring SETI back ‘down to Earth’ for a moment,” said study author Macy Huston, of the University of California.
“And think about where we really are today with Earth’s technosignatures and detection capabilities.
“In SETI, we should never assume other life and technology would be just like ours.
“But quantifying what ‘ours’ means can help put SETI searches into perspective.”
Aliens might also be looking out for atmospheric technosignatures. They’re clues in Earth’s atmosphere that show signs that the planet is occupied by humanity.
Scientists say aliens could spot signs like nitrogen dioxide emissions.
The upcoming Habitable Worlds Observatory will be able to spot emissions like these from around 5.7 lightyears away.
And scientists say that’s just beyond Proxima Centauri – the closest star to Earth after the Sun.
Once aliens get very close to Earth, they’d be able to see a lot more of the obvious signs.
WHAT IS THE HABITABLE WORLDS OBSERVATORY?
Here's what you need to know...
The Habitable Worlds Observatory (HWO) is a large space telescope.
Its mission is to hunt for – and image – Earth-sized habitable worlds.
These “exoplanets” will be outside of our own Solar System.
The HWO will be an infrared, optical, and ultraviolet telescope, giving it a a broad view of the universe.
It’s meant to look for planets in the habitable zones of their stars – where it might be possible for water to exist.
It’ll use a special coronagraph attachment that blocks out the light of the stars, to better capture views of the planets.
The HWO is expected to launch by May 2027, and hopes to identify and directly image “at least 25 potentially habitable worlds”, according to Nasa.
“It would then use spectroscopy to search for chemical ‘biosignatures’ in these planets’ atmospheres,” Nasa explained.
“Including gasses such as oxygen and methane which could serve as critical evidence for life.”
Picture Credit: Nasa
That might include city lights, or heat islands – the temperature differences you’d see from an urban population.
They’d also be able to potentially pick up on objects we’ve put into space, like orbiting satellites or craft on the Moon and Mars.
Part of this project is working out whether aliens might stumble upon humanity’s existence.
But it can also help scientists know what signs to look out for in their own hunt for alien life.
“One of the most satisfying aspects of this work was getting to use SETI as a cosmic mirror,” said Dr Sofia Sheikh, of the SETI Institute.
“What does Earth look like to the rest of the galaxy? And how would our current impacts on our planet be perceived?
“While of course, we cannot know the answer, this work allowed us to extrapolate and imagine what we might assume if we ever discover a planet, with, say, high concentrations of pollutants in its atmosphere.”
The idea is that scientists will look for signs of technology specifically.
EXOPLANETS – EXPLAINED!
Here's what you need to know...
- An exoplanet is a planet that is located outside of our Solar System and one that is orbiting its own star, as Earth orbits the Sun
- They are very hard to see with telescopes because they are often hidden by the brightness of their star
- Nasa sent the Kepler space telescope into orbit with the purpose of finding Earth-sized exoplanets that might support life
- More than 5,500 exoplanets have been discovered so far and more missions to find even more exoplanets are planned
- A good way to spot an exoplanet is to look for “wobbly” stars because a disruption to starlight can indicate that a planet is orbiting it and blocking its light intermittently
- Expoplanets are very common in the universe and the more we find that look like Earth, the closer we get to knowing whether Earth is the only life-bearing planet
Picture Credit: NASA/JPL-Caltech
These will be clues that couldn’t be explained by “natural phenomena” – and show that we might be looking at proof of intelligent life.
Scientists are already using radio telescopes to track down aliens. Optical telescopes can also be used to scan for laser pulses, which may be a sign of “communications or propulsion”.
“Another approach involves studying the atmospheres of exoplanets in habitable zones around stars to look for chemical signatures that might suggest life or industrial activity,” SETI explained.
“SETI scientists also consider technologies far beyond those currently invented on Earth, such as Dyson spheres, but these far-future technologies were not considered in this study.”
The research was published in The Astronomical Journal.
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Taking This Supplement Can Slow Down Aging, New Research Finds
You might not know it, but your workout routine and skincare regimen could be improving your biological age. Anti-aging practices like ice baths, facial treatments (plus, the products you use like retinol), and wearing sunscreen can help you physically look younger. But, presumably, you want to feel younger on the inside, too, right? Well, new research suggests that slowing down biological aging is as simple as taking one omega-3 supplement per day.
RELATED: Doctor Reveals the No. 1 Supplement to Take If You're Getting Older.
Research suggests that omega-3 supplements can delay biological aging.
Extensive research, as outlined by the National Center for Complementary and Integrative Health (NCCIH), has designated omega-3s (found in fish oil supplements) as a preventative measure for heart disease, stroke, high triglycerides levels, cognitive decline, and rheumatoid arthritis.
But a new study published in the journal Nature Aging claims that taking a daily omega-3 supplement can also slow down biological aging. What’s more, when paired with vitamin D supplementation and exercise, this magical trio can extend your health span even further.
"In my opinion, 70 is the new 50," senior study author Steve Horvath told The Guardian. "Clearly, these interventions are not the cure against aging. However, the findings reinforce my commitment to taking a low-dose omega-3, vitamin D, and exercising regularly, all in moderation."
RELATED: 7 Things Your "Good Quality" Fish Oil Supplement Must Have, Says Doctor.
You can add months to your life with daily omega-3 supplements, per the study’s results.
For the study, 777 Swiss participants (age 70 or over) from the DO-HEALTH trial were randomly assigned to one of eight cohorts, each with a specific task. One group was prescribed a daily omega-3 supplement, while another took a daily vitamin D supplement. A third group completed a 30-minute workout three times per week. The remaining groups did a combination of these tasks.
Routine phone call check-ins were completed every three months, in addition to annual in-person assessments, during which blood samples were taken. The study lasted for three years.
To quantify the correlation between omega-3s and biological aging, researchers used epigenetic clocks, which "measure DNA methylation, chemical modifications that build up on DNA and reflect the biological rather than the chronological age of the tissue," as explained by The Guardian.
Per data obtained from the epigenetic clocks, daily omega-3 supplements slowed down biological aging by three months. Furthermore, in combined groups, those who took both fish oil and vitamin D supplements and engaged in exercise saw a four-month delay in aging.
"While the effects may appear small with three to four months rejuvenation of biological age in three years, if sustained, they may have relevant effects on population health," lead study author and University of Zurich professor Heike Bischoff-Ferrari said in an interview with The Guardian.
RELATED: 6 Supplements You Should Never Take If You're Over 60, Doctors Say.
The takeaway:
The study says that when paired with vitamin D supplements and regular exercise, omega-3 supplements can slow biological aging by up to four months over three years. Additionally, researchers found that this power trio can help prevent certain cancers and aid against frailty.
That said, fish oil supplements are known to have hidden health risks. Studies have shown that these popular dietary supplements can cause irregular heartbeat and stroke in people without proper heart issues. They can also lead to blood clots, gastrointestinal issues, and negatively interact with other medications.
If you’re interested in upping your omega-3 intake, it’s best to first speak with a healthcare provider.
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