Are there any signs of alien life out there?
Well, there is no definitive answer to whether there are any signs of alien life out there, but many scientists are optimistic that we will find some evidence in the near future. According to NASA's chief scientist Ellen Stofan, I think we're going to have strong indications of life beyond Earth within a decade, and I think we're going to have definitive evidence within 20 to 30 years.

Some of the possible ways to look for signs of alien life include searching for water and organic molecules on other planets and moons in our solar system, detecting radio signals or other signs of technology from distant civilizations, and analyzing the atmospheres of exoplanets for biosignatures such as oxygen or methane.

One intriguing example of a potential sign of alien life is 'Oumuamua, a mysterious object that visited our solar system in 2017. Some astrophysicists, such as Avi Loeb from Harvard University, have suggested that 'Oumuamua could be a piece of extraterrestrial technology or debris from a distant star system.

However, these hypotheses are not widely accepted by the scientific community and require more evidence and investigation. The search for alien life is an ongoing and exciting endeavor that may reveal surprising discoveries in the future.

If you want to learn more about this topic, you can ask me more questions or visit some of these websites:

- [NASA - Search for Life](https://www.nasa.gov/topics/search-for-life/index.html)
- [SETI Institute - Home](https://seti.org/)
- [BBC Science Focus Magazine - New issue: Signs of alien life](https://www.sciencefocus.com/magazine/new-issue-signs-of-alien-life/)