3 ms·
This has always been the best explanation of why we don't see evidence of aliens. Any detectable species is less than a pixel on that timescale. Combined with
by njharman 17y ago
This has always been the best explanation of why we don't see evidence of aliens. Any detectable species is less than a pixel on that timescale. Combined with likelyhood of getting wiped out by natural (comet/asteroid) or technological(nuke, pollution/climate, custom disease, etc).
- AngryParsley 17y agoI think this timeline tells a different story: Intelligent life is very rare. Typically, life doesn't evolve beyond single-celled or primitive multi-celled organisms before the star goes red giant. The chances of general intelligence evolving are so small that we're probably the first.
- deleted 17y ago[deleted]
- deleted 17y ago[deleted]
- AngryParsley 17y agoUmm... no? Life on Earth started about 4 billion years ago. The universe is about 13 billion years old. Also, earlier stars had lower metallicity, which made it less likely for rocky planets to form. Population I stars (like the sun) are probably the first generation of stars with high enough metallicity to make rocky planets and life likely.