What urban design tells us about democracy

What did the universe look like before any stars turned on? Astronomers call that time the “dark ages,” and while they think it may be possible to see remnants of it in very low frequency radio signals, hearing those signals from Earth can be challenging. One possibility is to pu ...  Show more

To mark Earth Day, we asked you to tell us about your favorite places on the planet. You took us to the woods near Traverse City, Michigan, to a lake in Oklahoma, to Long Island Harbor where you spent your summers as a kid. Basking in a sea breeze and admiring a sunset are basic ...  Show more

It’s a measure of their insanity that leaders around the world are seriously considering nuclear war. Ivana Hughes of Columbia on what that would mean. (00:00) How Powerful Are Nuclear Weapons? (09:46) What Would Happen if a Nuke Detonated Over Times Square? (24:56) Ozone Layer D ...  Show more

Since the US bombing of Japan in World War II, the world entire has remained terrified of nuclear weapons. Even as scientists and scholars spent decades warning about the existential threat posed by technology that can literally end civilization, countries across the planet raced ...  Show more

Send a textJoin Professor Jeffrey Sachs and global security expert Jon Wolfsthal to unravel the stark reality behind the Doomsday Clock - now set at a perilous 89 seconds to midnight. What does this ominous timepiece truly measure, and why has humanity never been closer to catast ...  Show more

Much of our discussions about nuclear weapons focus on Oppenheimer, the Manhattan Project, or the Cold War. But what does the current nuclear age really look like? Sarah Scoles joins Heather Williams to discuss her book “Countdown” and share first hand reporting on the scientists ...  Show more