The site navigation utilizes arrow, enter, escape, and space bar key commands. Left and right arrows move across top level links and expand / close menus in sub levels. Up and Down arrows will open main level menus and toggle through sub tier links. Enter and space open menus and escape closes them as well. Tab will move on to the next part of the site rather than go through menu items.
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Peter J. Donaldson is on the staff of the National Academy of Sciences, but isn't defined by what he does.
I am a terrible poker player. I know exactly how bad I am because I once played with an empiricist—or finagler, depending on whether you think he was motivated by science or greed—who after each game calculated how much each of us won or lost.
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