How is an egg made? Why are they the shape they are? And perhaps most importantly, why lay an egg at all? Step by step as the egg hatches, host David Attenborough reveals the wonder behind these incredible miracles of nature.
See first-hand how the changing climate might affect crucial connections in nature.
Witness the springtime migrations of butterflies, birds, bison & bats.
Celebrate spring in this live event broadcast from iconic locations across North America.
