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Each grain of sand on earth represents 1 billion planets in the universe. https://www.reddit.com/r/spaceporn/comments/1af4prs/if_you_wanna_try_wrapping_your_he

• Aloisius 2y ago
  There are 100 million times more bacteria in the ocean than there are stars in the universe. Which really should tell people how rare the development of mitochondria was if it has only happened once here.
  • ASalazarMX 2y ago
    It didn't necessarily happen only once; maybe we were left with the most successful instance.
    • hughesjj 2y ago
      Not even that. There could be better civilizations than us out there that either 1. Died off or regressed 2. Plateaued 3. Is sufficiently far away or stealthy enough for us not to notice them (whether intentionally or not) I've often thought about the whole communications bubble argument... I don't buy it. I'd imagine, like wifi, other civilizations will maximize their communication bandwidth, which essentially also maximizes entropy which looks like noise to us. Compression, encryption, redundancy, multiplexing over frequency and amplitude and time, directional antennas and signalling... That's what we've done in under 100 years. I know there's stuff like organic markers etc, but if machines are doing most of the heavy lifting I don't think that would matter. Same with stuff like hydrogen emissions lines. Whatever is abundant will be used for "settled" and "dead" solar systems alike.