This week is all about fish. All about ALL the fish, actu­al­ly. Bio­me­chani­cist Adam Sum­mers shares about his adven­tures in study­ing fish and CT scan­ning them. Adam and a com­mu­ni­ty of researchers are work­ing to take 3D scans of all known fish on Earth: some 34,000 species and count­ing. New host Car­olyn Wilke and Adam dis­cuss the project, the diver­si­ty of fish — fish that fight, float upstream, cling to rocks and more — and advis­ing ani­ma­tors on the films Find­ing Nemo and Find­ing Dory.