What is baking powder, and how is it different from baking soda?

Thanks to Kove for sponsoring this video! Use my code AR64 to get more than 60% off the Kove Audio Noise Canceling Headphones here: http://koveaudio.com/ar64
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"Baking Powder Wars: The Cutthroat Food Fight that Revolutionized Cooking," by Dr. Linda Civitello: https://www.press.uillinois.edu/books/catalog/98ppx5cp9780252041082.html

Thanks to Dr. Rebecca Regan, formerly of Kansas State University, for scientific consultations.

My (very) old video about phase cancellation: https://youtu.be/eYgoPdzrKtY