Experimenters Eyeshah and Samiyah investigate why we get thirsty when we play sport.
16/20 Andy and Kip see Japanese macaques in the snowy mountains of Japan.
5/52 Hugo finds out what play is, and why kids love to do it.
10/26 Fluffy is determined to cheat her way to first place in the Super Sky Diving competition.
11/20 Jess meets up with some children and together they search in a meadow for butterflies.
12/20 Andy and Kip embark on a wild adventure to see fruit bats in Africa.
11/20 Andy and Kip embark on a wild adventure to see grizzly bears in Alaska.
Experimenters Evie, Sonny and Will meet a para-climbing champion at a climbing wall.
15/20 Andy and Kip embark on another wild adventure to see monarch butterflies in Mexico.
44/52 Hugo finds that choosing some things is hard, and sometimes he has no choice at all!