Topic: The Fermi Paradox: where are all the aliens?
16bitch !BMhSp1fpyA started this discussion 8 years ago#76,256
In 1950, during lunch, the physicist Enrico Fermi, famous for inventing the nuclear reactor, thought of an observation:
1. There are hundreds of billions of stars in the galaxy, and likewise there are many billions of planets.
2. Given that Earth developed life very early on, and most other planets are older than the Earth, there should be many planets that develop life.
3. While a life-bearing planet is unlikely to evolve intelligent life, there are so many planets that it should certainly happen many times.
4. Fermi estimated that it would take about 10 million years for a civilization to effectively colonize the galaxy, and even less to just explore it, using self-replicating machines (von Neumann probes).
5. Given that the galaxy is many billions of years old, it would be incredibly unlikely that no civilization has risen and explored the galaxy during this timeframe.
6. Therefore, we should expect to see tons and tons of evidence for extraterrestrial intelligence in the cosmos!
7. ...but we don't.
So, Fermi proposed the question: why have we detected no clear signs of alien intelligence?
There have been dozens, maybe hundreds, of proposed solutions to this problem - what do you think it might be?
16bitch !BMhSp1fpyA (OP) replied with this 8 years ago, 7 hours later, 23 hours after the original post[^][v]#897,467
@897,331 (Catherine !ttGirlsPl2)
...no, that's me. I changed my username to Snowshard because I didn't want a swear word in my name since your forum is clearly supposed to be non-toxic. @previous (I)
can confirm
(Edited 32 seconds later.)
Anonymous C replied with this 8 years ago, 9 minutes later, 23 hours after the original post[^][v]#897,468
@previous (16bitch !BMhSp1fpyA)
Wait what? No swear words?