When John and I say good-bye to each other after a visit, we never know exactly when and where we'll meet next.

FORBES: Life

"We know these things feed on each other, that when a place develops a critical mass of arts and vibrancy it tends to attract talented people, it tends to raise income, " he says.

BBC: Putting a price on the value of art

And when we look at objects that we want to group into one category, you know, if they're like each other, then, you know, we feel that they should have - that they should be lumped together.

NPR: Astronomers Prepare to Fight Pluto Demotion