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Comment Re:Just buoyancy (Score 4, Informative) 58

"Normal" buoyancy is about less dense objects floating on top of a fluid. This (granular convection) is about larger objects rising to the top of smaller ones.

As your golf ball example shows, the "floating" object can be denser than the "fluid," which would not be the case in "normal" buoyancy. And there's no upward force being exerted on the objects by the "fluid."

Comment Dur (Score 0) 202

There are now four USB ports which means you don't need a hub to work with a mouse, keyboard and WiFi dongle.

Oh, good, thanks for that. I was having trouble imagining what "four" was, but now I know it's at least "three."

Comment Re:not true, IIRC (Score 3, Informative) 202

nonsense statement...had to read twice to be sure, but this is just technobabble and not based on scientific definitions of "space" and "light"

That's weird, I understood it perfectly as an (admittedly somewhat simplified) explanation of how space expands and how light travels through that expanding space. Don't blame your lack of understanding on what you imagine to be the GP's lack of clarity.

in other words, **NO** there is not 'light' hitting us from 14B ly+

No-one said there is. There is light hitting us which was emitted by objects which are now* more than 14 billion light years away.

*for a given value of "now," that is, but I'm not sure I'd enjoy trying to explain that to you.

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