Destin Sandlin discusses missile testing, astronaut applications, and why he created the wildly popular YouTube channel Smarter Every Day. Listen to the latest Signals & Threads podcast episode: https://jane-st.co/Numberphile-ST-WillWilson Check out other episodes Signals & Threads here: https://jane-st.co/Numberphile-SignalsandThreads Destin’s YouTube channel is Smarter Every Day: https://www.youtube.com/smartereveryday We also co-hosts the podcast No Dumb Questions: https://www.nodumbquestions.fm/ With thanks to the Ben Delo Foundation - https://delo.org/ You can support Numberphile on Patreon - https://www.patreon.com/numberphile Here are our Patrons - https://www.numberphile.com/patrons Numberphile is created by Brady Haran