Prof.Marvel

It is my understanding that a positron is the antimatter counterpart of an electron and they certainly do exist on our planet. Positrons are the basis for PET (positron emission tomography) scans.

I “suppose” IQ tests acceptably measure what they were intended to measure. Folks like to mess with the results by saying they don’t measure common sense, or knowledge, or memory, or any number of other things. I don’t think that they are supposed to. You can’t invalidate a foot race by saying: “Yeh, but it isn’t a test of jumping ability” because that’s got nothing to do with a foot race. So … I guess the big question is: “What is intelligence?” Or, even more importantly, what do the test designers consider to be “intelligence”? Does anybody know of a place where “they” have written it down? I'd like to read that. Just for the record: 163.

If you hold a single grain of sand up to the sky, at arm's length, it will cover 2,000 galaxies.