He handed back the paper to Robert Jordan and looked him over.

NPR: Robert Jordan, Hemingway's Bipartisan Hero

The paper, authored by Jordan, Fisher and Perets, will appear in an upcoming issue of the Astrophysical Journal Letters.

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Jordan Silverman, founder of Star Toilet Paper, a startup that helps advertisers promote their logos and deals on rolls of toilet paper, spoke about his reasons for attending the event.

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Robert Jordan unpinned a safety pin that ran through his pocket flap and took a folded paper out of the left breast pocket of his flannel shirt and handed it to the man, who opened it, looked at it doubtfully and turned it in his hands.

NPR: Robert Jordan, Hemingway's Bipartisan Hero