Feodor Romanenko raises his arms. “Dear colleagues,” he says, with his usual puckish smile, and then launches into his Russian-accented French. “Dear colleagues” aren’t quite the only words of English he knows, but they’re clearly his favorites, useful for summoning attention from a motley international group such as ours. Dear colleagues, I propose that we now climb up there, he says, indicating a precipitous, unstable, ugly hillside of scree. Dear colleagues, lunchtime! Let us enjoy it here atop the butte before high winds and the next snowstorm arrive. Dear colleagues, he brags cheerily to our evening assembly, today my group made five wondrous discoveries, including two kinds of basalt! and some Mesozoic sediments! and evidence of recent deglaciation! Romanenko is a geomorphologist based at Moscow State University, and after 28…