CW: Discussion of sex

In honor of Valentine's Day, the girls discuss historical natural aphrodisiacs, including the rare few that may actually have an effect.

Your eyes are really just bits of brain that stick out the front of your face so they can reach the light.  Learn about how our eyes register light, and how our color vision compares to that of different animals.  

Inspired by Erika's family tradition of baking bread to celebrate the New Year, the girls discuss the role of yeast in the history of bread making and beer brewing.

It's a bright, shiny episode as Erika and Katie explore Nature's Christmas lights -- animals that glow!

In this listener-requested episode, Erika and Katie breathe deeply of the science behind smells, including how perfumes and odor-eliminators work.

The girls dip into the wild world of mushrooms, exploring fun fungus facts, the scientifically best way to cook mushrooms, what colors you can get from using mushrooms as dyes, and how magic mushrooms affect your brain.  

In their Thanksgiving episode, the girls discuss whether turkey can really make you sleepy, what the real difference is between dark and white meat, and how to make some thick side dishes.

Recording their first in-person episode, Erika and Katie review one of the oldest practiced forms of chemistry -- the science behind natural dyeing of plant and animal fibers.

Are humans secretly being turned into zombies by unseen biological agents?  Tune in to find out!

The girls discuss how wasps make zombies out of spiders and ladybugs, and how roaches have learned to fight back!