Might the inorganic components of life on earth have emerged from much deeper in our planet than previously thought? Metals including copper, molybdenum and zinc are essential components of many enzymes and proteins. A new study in the journal Geology suggests that sexual eukaryotic life forms began to appear soon after a period of unusual geological activity that could have brought these metals to the surface from deep within the Earth's crust. The explosion of new life occurred in the Mesoproterozoic about 1.6 billion years ago and not long after the formation of the supercontinent Nuna, also known as Columbia.
The terrestrial origins of sex