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Jun 16, 2021 · Rebecca Allen, space technology expert: Yes, but they probably don't look like us. There are more than 100 billion planets estimated to exist in our galaxy alone (with some six billion potentially being Earth-like). Therefore, the probability that life exists elsewhere is all but confirmed.
- 2 min
- Ross Pomeroy
- 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 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 trying to answer one of the most profound questions ever: Is there life beyond Earth?
Jun 13, 2021 · 5 experts. Even if aliens exist, are intelligent like humans and interested in making contact with us, what are the chances they’ll be close enough for us to hear them screaming their presence...
Jun 7, 2023 · An exploration of whether aliens are out there, what kind of extraterrestrial life is most likely to exist, and how we're looking for it.
May 4, 2021 · 4 May 2021. Do aliens exist? It’s a question that has spawned countless films and TV series, books, podcasts, artwork and conspiracy theories, but the question of whether or not we are truly...
3 days ago · Do aliens exist? Extraterrestrial life has never been discovered. However, that doesn’t mean it doesn’t exist. And at NASA, astrobiologists like Dr. Lindsay Hays are trying to answer one of the most profound questions ever: Is there life beyond Earth?
