This week, Josh talks about Castells, Caitlin talks about whispering galleries, Chris talks about George Washington Carver, and Joel talks about Toxoplasma gondii.
https://en.wikipedia.org/wiki/Castell
https://en.wikipedia.org/wiki/Whispering_gallery
https://en.wikipedia.org/wiki/George_Washington_Carver
https://en.wikipedia.org/wiki/Toxoplasma_gondii