Why we might be alone in the Universe

[Anomalocaris]

Based on our understanding of physics, there are certain things, such as probing quantum world at extremely tiny scale, that in principle can only be done with expenditure of ever more enormous amount of energy.  The law of thermodynamics says there is in principle a limit to how efficient such expenditure of energy can be.   So there is an argument that as civilization become more advanced then ours, it will inevitably leak ever more in principle unavoidable waste energy, most likely in the form of EM.

And yet we don't seem to be able to detect this leakage, at least in any form that would indicate it comes from technology.  I happily grant your point that we haven't explored much of the universe, but it seems telling that everywhere we have looked, we've found nothing.

Boru

1. We are extremely short sighted.

2. We can only see a small percentage of things within our visual range.

3. We can only imagine what technological civilization looks like, and only a tony percentage of what we imagine technological civilization to look like consist of things we can actually see, if it were within range

4. We have no idea what other technological civilization actually looks like.


It’s like a person on a surf board seeking what is on the ocean floor by reaching once or twice down with his hand, and feeling notions, claiming there is thus likely nothing on the ocean floor since everywhere he felt there was nothing.