The episode shows that at this point of the future, volcanoes are belching out copious amounts of greenhouse gases causing the planet to overheat. It shows how swampus breed and how toraton have evolved to cope with their new size.
The toraton cannot withdraw into its shell like the tortoise could, but its shell is used to protect and partially support its muscles. The toraton has evolved a digestive system that has a muscular stomach to grind its food, and a gut filled with bacteria to digest the rest of the vegetation. Its legs have moved directly underneath its body to support the tons of massive muscle on this enormous creature. Toratons mate back to back because they are so massive that if the male were to get onto the female she would be injured. She lays her two large eggs in a nest. She must help them crack their shells open. They are cared for 5 years by their parents. When an adult toraton feels death approaching, it will migrate to large toraton graveyards, where decomposing toratons produce enormous amounts of heat.
The Future is Wild - Episode Six Waterland