with Jim Elser.

with Athena Aktipis.

with Steve Neuberg.

with Jennifer Fewell.

with Aaron Baisdell.

with Nirav Shah.

with Bas Rokers.

with Todd & Viviana Weekes-Shackelford.

with Robbie Wilson.

with mystery zookeepers.

with Nicole Prause.

with Marlene Zuk.

with Adam Waytz.

with Hilary Anger Alfenbein.

with Jason De León & Abigail Bigham.

with Paul Phelps.

with Rob Tanner.

with Bob Krebs.

with Peter McGraw.

with Nicholas Epley.