The trajectory of early evolution, if not the origin of life, may have been dependent on the formation of molecules in ice grains in deep space billions of years ago.

It was a chill evening in fall. / He had moved his table of mirrors over to the open window / and bundled himself warmly against the cold night air.

"Today you will learn to fight," his father said. "Though I hope you will never need to."

What I don't understand . . . is the near-universal acceptance of celebrities as experts on anything, let alone everything.