Sean McMahon / Yale University / Reuters
Editor’s Note: This article previously appeared in a different format as part of The Atlantic’s Notes section, retired in 2021.

“It might have been a sort of … feeding apparatus, like the jawed tongue of the monster in Alien,” Philippe Janvier, a paleontologist, on the anatomy of the prehistoric Tully monster, pictured above.

“Several hundred million revisions or contributions don’t fall together as a high-quality encyclopedia just by accident,” —Aleksi Aaltonen, who studies Wikipedia.

“In some ways it’s more terrifying to confront a world in which your baby could be affected by something you have no control over [than] to live in a world in which people are pulling strings behind the scenes to cause these unpredictable threats,” —Brendan Nyhan, a political scientist, on the conspiracy theories about the Zika virus.

(Previous quotes from our sources here)