NPR's Ailsa Chang speaks to mathematician Eugenia Cheng about the Pascaline -- a 17th-century invention credited as the first mechanical calculator.
Copyright 2025 NPR
Ailsa Chang is an award-winning journalist who hosts All Things Considered along with Ari Shapiro, Audie Cornish, and Mary Louise Kelly. She landed in public radio after practicing law for a few years.
Linah Mohammad
Prior to joining NPR in 2022, Mohammad was a producer on The Washington Post's daily flagship podcast Post Reports, where her work was recognized by multiple awards. She was honored with a Peabody award for her work on an episode on the life of George Floyd.
