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Comment Re:With all due respect to Mr. Hawking and us... (Score 1) 280

1) 90% of our cells are bacteria.
2) The other 10% have endsymbionts (aka mitochondria) in them.
3) Much of our DNA has been "infected" by viruses.
4) Most people on the planet are content to live like sheep (do what their fathers did, and their fathers before them, while happily following a strong leader).


Comment Re:You'd think someone as smart as Hawking ... (Score 1) 280

That's a lot of energy being directed into space.

The number of energy sources is great, but at what wattage are they sending them (I bet "low"), and how many are directed beam?

Remember that of all the energy that stars send out (the Sun emits 3.8 x 10^26 watts), only a minuscule fraction of photons reach us. How many photons from a 1,000 watt source will arrive at Gliese 823?

Comment You'd think someone as smart as Hawking ... (Score 1, Interesting) 280

would know that TV and radio -- except for AM -- transmitters are designed so as not to radiate energy where it's wasted (like, for example, towards the sky). Plus, of course, the transition to fiber optics reducing EM emissions even further.

If we figured that out pretty soon after inventing radio, it stands to reason that ETs would have also.

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