Have you ever wondered what tears are? If not, is it because you think you already know? Chances are, you don't actually know what tears are! It's probably more complex than you'd expect. Grab some tissues, let's get into it!
Aug 27
Can water air-condition your house?
What exactly is a swamp cooler, and why can it beat the heat in Arizona but leave you sweaty and betrayed in Houston? How can an air conditioner run on water, what does humidity have to do with its effectiveness, and could an icy new invention help prevent overloaded power grids? ... Show More
31m 44s
Aug 20
What’s the dark side of air conditioning?
Could a cheaper, more environmentally friendly refrigerant already exist, and could corporate lobbying be helping keep it out of American air conditioners? Why did the chemicals once hailed as safe alternatives become environmental villains, and are their replacements actually mu ... Show More
53m 21s
Apr 2025
Why do we cry? With Lauren Bylsma, PhD
Pain, sadness, joy, awe – under the right circumstances, any of these emotions can bring on tears. Lauren Bylsma, PhD, talks about why crying evolved, the psychological and social purposes of tears, why some people cry more easily than others, and whether having a good cry can ma ... Show More
26m 14s