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This video segment from Nature: “The Mystery of Eels” explores the unique and mysterious early life cycle of eels, which are born at sea before migrating up freshwater rivers with the probable guidance of a magnetically sensitive iron crystal in their heads.

This video segment from Nature: “The Mystery of Eels” describes the threat to New Zealand’s eels, posed by hydroelectric dams on their migratory routes, and profiles a former commercial eel fisherman who’s now devoted to saving his former quarry from certain death in dam turbine blades.

This video segment from Nature: Animal Odd Couples introduces a male brant goose that has selected his lifelong mate: a female tortoise.

Until recently, scientists were not comfortable describing bonds between animals as “friendships.” However, scientists have now determined that humans are not the only animals who form them.

This video segment from Nature: Animal Odd Couples showcases the relationship between Kasi, a cheetah, and Mtani, a dog. Kasi and Mtani live at Busch Gardens – both were “orphaned” when they were young and the keepers at Busch Gardens developed a pilot project to observe the relationship between them.

In this video segment from Nature: “What Plants Talk About,” ecologist James Cahill describes how root growth in plants follows patterns similar to those of animal foraging, how plants identify and select their food sources in the first place, and what that selection suggests about their level of behavior.

In this video segment from Nature: “What Plants Talk About,” ecologist James Cahill explains how modern time-lapse photography and other technological innovations are enabling a richer understanding of the sophisticated and varied ways plants interact and engage with their environment—largely though growth in their never-ending search for food.

In this video segment from Nature: “What Plants Talk About,” ecologist Ian Baldwin explains the many different and highly sophisticated ways in which plants, like wild tobacco, have adapted to identify and defend themselves from predators in hostile and often unfamiliar environments.

This video segment introduces and explores the lives of meerkats. Inhabiting the African plains, meerkats are “desert specialists” that have evolved and adapted to a harsh climate.