Countdown: Our Last, Best Hope for a Future on Earth?Alan WeismanIn conversation with Ursula K. Heise, professor of English and faculty, UCLA Institute of the Environment and SustainabilityWeisman offers a long awaited follow-up to The World Without Us, his brilliant thought experiment that considered how the Earth could heal if relieved of humanity’s constant pressures. Now, after traveling to more than 20 countries to ask four questions that experts agreed were probably the most important on Earth—he explores the complexity of calculating how many humans this planet can hold without capsizing. **Click here to see photos from the program!