In this set of short stories, 99% Invisible producers talked with host Roman Mars about everything from climate-changing sheep to the persistent urban legend behind the invention of a space pen.

Mini-Stories: Volume 10

99% Invisible’s Impact Design coverage is supported by Autodesk. Autodesk enables the design and creation of innovative solutions to the world’s most pressing social and environmental challenges. Learn more about these efforts on Autodesk Redshift, a site that tells stories about the future of making things across architecture, engineering, infrastructure, construction and manufacturing.