Bill Nye explains the food web and how every living thing, even a human, is connected in it. He illustrates the food web using rope and a box and notes that all living things depend on plants.

An asteroid has hit the earth, which has allowed for different organisms to develop. While observing the strange creatures, the humans notice a food chain since each organism is food for another one.

This clip provides an overview of rainforests. It describes their age, unique characteristics, importance to the Earth's overall ecosystem, and importance to modern medicine. It also discusses the recent threat to these habitats: deforestation due to modern industry demands.

Jimmy is afraid of there being polar bears in the South Pole. The brothers assure him that there won't be any of them here.

The Kratts crew watch the mother lemur while she uses her teeth to groom her baby.