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- There aren't any aliens to find. As unlikely as it seems in a galaxy with hundreds of billions of stars and as many as 40 billion Earth-size planets in habitable zones, we could be alone.
- There is no intelligent life besides us. (This assumes, of course, that humans count as intelligent.) Life may exist, but it could simply take the form of miniscule microbes or other cosmically "quiet" animals.
- Intelligent species lack advanced technology. Currently, astronomers utilize radio telescopes to listen intently to the night sky. So if alien species aren't broadcasting any signals, we'd never know they existed.
- Intelligent life self-destructs. Whether via weapons of mass destruction, planetary pollution, or manufactured virulent disease, it may be the nature of intelligent species to commit suicide, existing for only a short time before winking out of existence.
Sep 8, 2023 · Fermi's Paradox: A Cosmologist Explains Why We May Never See Aliens. Where Are They? There Are Probably Alien Civilizations in the Cosmos, but We’ll Never See Them. The universe is so...
- Science Educator And Theoretical Cosmologist
Mar 31, 2019 · The hypothesis holds that they can see us, but we can't see them. Some astronomers ascribe to the so-called zoo hypothesis, which holds that space aliens are keeping Earth and its inhabitants in...
- Senior Astronomer at The SETI Institute
Jul 3, 2018 · In early June, Anders Sandberg, Eric Drexler, and Toby Ord of the Future of Humanity Institute (FHI) released a paper that may solve the Fermi paradox — the discrepancy between our expected...
- Liv Boeree
- It’s a numbers game, and probability suggests aliens are out there.
- We already know of hundreds of potentially habitable planets. We are able to measure the atmospheres of these exoplanets using a technique called spectroscopy.
- We’ve found life on earth in places that we didn’t think life could possibly exist. When we’re contemplating the existence of life beyond our planet, it’s worth considering that we’ve discovered microbes inhabiting spaces on Earth where the idea of survival was previously inconceivable.
- The life that’s out there may not be intelligent life.
Sep 10, 2021 · Do aliens exist? Extraterrestrial life has never been discovered, but that doesn’t mean it doesn’t exist. At NASA, astrobiologists like Lindsay Hays are.
Jun 13, 2021 · According to the Times’s sources, the report does not provide any clear link or association between more than 120 incidents of UFO sightings from the past two decades, and a possibility of Earth...
