Did you know...
...that the initials of the designers of American coinage appear on the coins they designed? (They're often really tiny. Good luck finding them all)
...that laws had to be passed to prevent the wholesale dumping of useless gasoline as a waste product before cars were invented? (Nobody knew what to do with the stuff at first)
...that the signatures of the designers of the original Macintosh computer signed their names in the molds used to make the enclosures? (This persisted up through the SE series)
...that there are actually more than a dozen forms of ice? (And that's just ice made from water)
...that brushing your gums is just as important as brushing your teeth? (Or at least the juncture)
...that Maryann is the only castaway still being paid for the series? (Her husband/agent insisted on residuals, none of the other cast did)
...that you can make ordinary salt water out of drain cleaner and pool chemicals? (HCl + NaOH = HOH + NaCl, and all that)
...that modern CPUs under load generate more heat per square millimeter than pretty much any other non-nuclear source? (We're talkin' really small scale, here)
...that it is possible to encode pictures within sound waves? (Handy linkage
here)
...that fire behaves like a liquid? (A liquid lighter than air, but still a liquid)
...that the entire Human Race was (probably) almost entirely wiped out and had to practically rebuild itself from scratch? (The "Toba event")
...that cleanser and toothpaste can be used to restore your foggy acrylic headlights to full brightness? (Or you could buy one of those expensive kits instead, if you
really want)
...that you can also start a fire with toothpaste (or chocolate!) and a soda can? (Handy if you're stranded on a desert island near Hansel & Gretel's witch house, I guess)
...that cobalt and nickel will stick to magnets? (Iron isn't the
only magnetic metal)
...that I spend waaay too much time learning unconnected* facts? (I have a very large reference library, but this is all I could do from memory in 20min).
--Patrick
*Not useless.
Never "useless."