Sylvia Tara (@SylviaTaraPhD) holds a PhD in biochemistry, and in her new book The Secret Life of Fat: The Science Behind the Body's Least Understood Organ and What It Means For You she examines the function and behavior of fat, why it's essential to our lives, how our genetics, gender, hormones and microbiomes affect it and much more. Her book is on sale December 27th, and you can pre-order it here or visit thesecretlifeoffat.com for more information.

This episode is brought to you by Curiosity Box by Vsauce. To get your mystery box full of geeky science toys and gear along with a FREE Vsauce beanie, visit curiositybox.com/probablyscience.