uranus-pluto and material energy

"The Uranus-Pluto conjunction of 1705-16 coincided with the invention of the steam engine and the discovery of the use of coal for iron-smelting furnaces that began the Industrial Revolution and the age of steam, iron, and coal. The following conjunction of 1845-56 coincided with the discovery of petroleum oil as a fuel, a discovery that began the petroleum age whose cultural, ecological, and geopolitical consequences are still unfolding. And the following opposition of 1896-1907 coincided with the birth of the nuclear age with the discovery of radioactivity in uranium, the isolation of radium and polonium, and Einstein's E = mc2 formulation." [Richard Tarnas, Cosmos and Psyche]