They're all in a day's work for Paul Sipiera.
If Antarctica had a frequent-visitor club, planetary geologist Paul Sipiera would be a gold member. As a professor at William Rainey Harper College in Palantine, Illinois, and president of the Planetary Studies Foundation, he's been to Earth's southern edge seven times, most recently leading science-minded tourists on an 18-day expedition. He spoke to us about the weather, dodgy food and his plans to return.
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