[00:00.51]Earth. A biosphere [00:04.51]A complex [00:07.51]Subtly balanced life support system [00:31.51]Et turtur nidum [00:36.51]Ubi reponat pullos suos [00:47.21]Altaria tua Domine virtutum [01:02.01]Rex meus et Deus meus and the turtledove a nest
