Think back, way back. Beyond last week or last year … to what was happening on Earth 100,000 years ago. Or 100 million years ago. It’s hard to fathom such enormous stretches of time, yet to understand the evolution of the cosmos – and our place in it – your mind needs to grasp the deep meaning of eons. Discover techniques for thinking in units of billions of years, and how the events that unfold over such intervals have left their mark on you. Plus: the slow-churning processes that turned four-footed creatures into the largest marine animals that ever graced the planet and using a new telescope to travel in time to the birth of the galaxies. Guests: Jim Rosenau – Artist, Berkeley, California Robert Hazen – Senior staff scientist at the Geophysical Laboratory at the Carnegie Institution of Washington, executive director of the Deep Carbon Observatory and the author of The Story of Earth: The First 4.5 Billion Years, from Stardust to Living Planet Neil Shubin – Biologist, associate dean of biological sciences at the University of Chicago, and the author of The Universe Within: Discovering the Common History of Rocks, Planets, and People Nicholas Pyenson – Curator of fossil marine mammals at the Smithsonian Institution’s National Museum of Natural History in Washington D.C. Alison Peck – Scientist, National Radio Astronomy Observatory in Charlottesville, Virginia Descripción en español First released April 22, 2013. Learn more about your ad choices. Visit megaphone.fm/adchoices

Think back, way back. Beyond last week or last year … to what was happening on Earth 100,000 years ago. Or 100 million years ago. It’s hard to fathom such enormous stretches of time, yet to understand the evolution of the cosmos – and our place in it – your mind needs to grasp the deep meaning of eons. Discover techniques for thinking in units of billions of years, and how the events that unfold over such intervals have left their mark on you. Plus: the slow-churning processes that turned four-footed creatures into the largest marine animals that ever graced the planet and using a new telescope to travel in time to the birth of the galaxies. Guests: Jim Rosenau – Artist, Berkeley, California Robert Hazen – Senior staff scientist at the Geophysical Laboratory at the Carnegie Institution of Washington, executive director of the Deep Carbon Observatory and the author of The Story of Earth: The First 4.5 Billion Years, from Stardust to Living Planet Neil Shubin – Biologist, associate dean of biological sciences at the University of Chicago, and the author of The Universe Within: Discovering the Common History of Rocks, Planets, and People Nicholas Pyenson – Curator of fossil marine mammals at the Smithsonian Institution’s National Museum of Natural History in Washington D.C. Alison Peck – Scientist, National Radio Astronomy Observatory in Charlottesville, Virginia Descripción en español First released April 22, 2013. Learn more about your ad choices. Visit megaphone.fm/adchoices