Deeper, Deeper, Deeper Still

He uses the example set forth by Charles Darwin postulating the existence of the long-tongued Morgan's sphinx moth based on the nature of the comet orchid with pollen far within the flower.

He further demonstrates that scents from flowers are used to trigger olfactory centers in the brain, stimulating the mind to threats as to aid in the survival of the species.

Tyson narrates how Greek philosophers Thales and Democritus postulated that all matter was made up of combinations of atoms in a large number of configurations, and describes how carbon serves as the basic building block for life on Earth due to its unique chemical nature.

Tyson examines the basic structure of atoms, their protons, neutrons, and electrons, and the nature of nuclear fusion, a process found to occur within most stars.

Tyson concludes by noting that neutrinos from the Big Bang still exist in the universe but, due to the nature of light, there is a "wall of infinity" beyond which we cannot observe.