Scotch tape, which has been around since 1930, emits x-rays when unrolled.
Transistors, which have been around since the late 1940's, produce a new state of matter, distinct from solid, liquid, gas and plasma.
Alan Greenspan, who has been around forever, says "oops." (Of course, in Greenspan-ese, it takes 3247 syllables.)
We know so little, even about the most commonplace, mundane things in our lives. And yet we strut around proclaiming this and declaring that as if we were all knowing.
A little humility would not be out of place.