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

Manu Prakash, the Stanford University engineer who created the Foldscope (pictured above, by Aaron Pomerantz): “The biggest thing we’re trying to do is to make people curious. Our ambition is that every kid should be able to carry a microscope in their pocket.

Jason Scott, historian at the Internet Archive and founder of the Archive Corps: “I’ve gained a reputation as someone you let know when things are going away.”

Tyffani Delacruz, whose home was flooded by Hurricane Katrina when she was 13: “All of a sudden, we were homeless. I come from a nice, middle-class family. You never think at 13 that everything can be taken away from you, but that’s what happened.”

(Previous quotes from our sources here.)