Despite countless attempts of scientists and philosophers, no one seems to have come up with a satisfactory definition, not even with the aid of today's advanced theories on complex systems. (dreamideamachine.com)
Our research uses empirical observations of embryos and natural populations with an aim toward advancing theory about the role of developmental processes in influencing evolutionary patterns. (kavanaghlab.org)
They therefore advanced theories in which the universe was expanding at the present time, but didn't have a beginning. (newscientist.com)