It is true that the cosmos was at one point a swirling mass of gas and dust out of which has come the extraordinary complexity of life as we experience it. (firstthings.com)
It explains how, from simple beginnings, the diversity and complexity of living things arose. (discovermagazine.com)
And the beauty of language is its complexity, its capacity for describing the immense complexities of life and the human experience. (edutopia.org)