1 bya Multicellular organisms appear; initially colonial algae, and later seaweeds living in the ocean
900ma The choanlaflagellates develop. THese protists are considered the ancestors of the entire animal kingdom.
750-580 ma Precambrian Varangian Ice Age - So severe that oceans freeze except for in the tropics. Last big freeze, after this evoloution begins to accelerate.
600ma Spounges develop from cell colonies. Following spounges are jellyfish and multicellular animals, appearing in the ocean.
590ma Cambrian - Aquatic life is developed. All modern phyla of animals develop. First vertebrates arise, trilobites are abundant. Flatworms, the first animals with a brain have developed.
360ma Plants evolve seeds.
You get the idea.
Well, for me it is.
Trev's thrilled that we're in the carboniferous and the Permian, now.
I wish my desktop was working so I could print out some pictures - but it can wait.