The advent of sex may not have begun with the first micro orgasm but, it was no less earth moving.
With advent of sexual reproduction, some one and half billion years ago, life on Earth took a major evolutionary leap. Until then evolution was agonizingly slow. Before life stumbled on sex as a reproductive strategy new varieties of organisms could only arise from the accumulation of random mutations - the selection of a few typographical errors, letter by letter, in life’s genetic code. With the invention of sex, two organisms could now exchange whole paragraphs, pages and books of their DNA code, and thus evolution could proceed at a faster pace.
In evolutionary terms, sex is more important than life itself. Sex fuels evolutionary change by adding variation to the gene pool. The powerful urge to pass our genes on to the next generation has likely changed the face of human culture in ways we are only now beginning to fully understand.
Today on Cosmic Visions we continue our year long celebration of the life and work of the naturalist Charles Darwin and the epic story of life on Earth with the fifth installment of the landmark PBS television series “Evolution” – Why Sex.
Evolution – Why Sex