Hank introduces us to comparative anatomy, which studies the similarities and differences in animal anatomy to support the theory of evolution and the shared ancestry of living things. [8:50]

Hank introduces us to comparative anatomy, which studies the similarities and differences in animal anatomy to support the theory of evolution and the shared ancestry of living things. [8:51]

Hank continues our exploration of animal phyla with the more complexly organized annelida and arthropoda, and a biolography on insects. [13:15]

David Stokes helps us understand differences in animal skulls. [10:42]