How do gemstones get their color?

#236 When a retired chemist wrote in… we had to explore to his great questions. How does reverse osmosis actually work? Should you put aluminum foil in your dishwasher? Why do mixed powders mysteriously un-mix themselves? This episode is full of clever questions, surprising chemi ...  Show more

Question and Response #76 You asked… so we answered. What do carbon chains have to do with Greek words? How do MRIs make “3D pixels”? Is that pool smell actually chlorine? And wait… are birds blue, or is that just a trick of the light? This episode is a rapid-fire round of your q ...  Show more

Why is it so hard to get a picture of the Milky Way? How much of our galaxy have we mapped? What the heck is a "barred spiral" and what does that have to do with our core? I discuss these questions and more in today's Ask a Spaceman!

Today it’s great to chat with Lori Gottlieb and Guy Winch on the podcast. Lori Gottlieb is a psychotherapist and New York Times bestselling author of Maybe You Should Talk to Someone, which has sold over a million copies and is currently being adapted as a television series. In a ...  Show more

Send us Fan MailIn Episode 139 of Book Talk, Etc., Tina and Renee share their possible 5+ star reads. They also share what they've been loving lately, their latest reads, and have book talk about trying to find 5-star reads. If you enjoy this episode, be sure to FOLLOW/SUBSCRIBE ...  Show more

This episode begins with a rant. This rant, in particular, comes from Dan Engber - a science writer who loves animals but despises animal intelligence research. Dan told us that so much of the way we study animals involves tests that we think show a human is smart ... not the ...