What will the next ice age look like with our warmer global climate? Climatologist Gavin Schmidt recaps some past ice ages, and then gives us a glimpse into the future. Find out how dropping carbon dioxide levels led to our current cycle of ice ages, and how rising levels might change our future expectations. Don’t miss comedian Chuck Nice confuse Milankovitch cycles with Donald Trump’s wife. Plus, Bill Nye The Science Guy talks about his college days hanging out by glacier-formed lakes.