[1] LUCA: The Last Common Ancestor, is the hypothesized Ancestral Cell from which all lifeforms Descend 

[2] Grimnismal: From the Flesh of Ymir the Earth was made, The Oceans from his Blood, The Hills of Bones, The Forest of Hairs and His Skull formed the Sky...

[3]  The first Humans were shaped out of a Tree which grew from the Earth