Explore the mysteries of dark energy and its profound impact on the universe in this captivating 1-hour 25-minute lecture by Eric Linder, Deputy Director of the Berkeley Center for Cosmological Physics. Delve into fundamental forces of physics, the evolution of dinosaurs, and the mapping of cosmic history. Examine key concepts such as the Hubble Deep Field, Three Pillars of Cosmology, and the Supernova Factory. Investigate intriguing topics like the Iridium Layer, KT Boundary, and periodic analysis. Uncover the secrets of automated telescopes, cosmic rays, and the average distance between galaxies. Explore the accelerating universe, counteracting forces of gravity, and engage with hands-on examples using rubber bands and bowling balls. Gain insights into the cosmological constant, spacetime, and field theory. Conclude with a comprehensive summary of dark energy and its implications for our understanding of the cosmos.