It's Friday, December 16th, 2016, and you're listening to Inquiring Minds.

I'm Kishore Hardy.

Indre will be back next week.

Each week, we bring you a new, in-depth exploration of the space where science, politics, and society collide.

We endeavor to find out what's true, what's left to discover, and why it all matters.

You can find us online at

motherjones.com slash inquiring minds or on Twitter at Inquiring Show. You can subscribe to the show

on iTunes or any other podcasting app. Today's episode is brought to you by Heifer International.

Heifer International's mission is to end hunger and poverty while caring for the earth.

Heifer International works to end hunger by providing livestock, agricultural training, tools, and education to small-scale farmers.

So give a gift of Heifer this holiday season. Check out Heifer.org slash minds for more information or call 888-548-6437.

That's Heifer.org slash minds. Help and Hunger. And today's episode is sponsored by Children's

International. When you give by Children's International.

When you give to Children's International, you're giving children the health, education,

empowerment, and employment they need to break free for life.

At Children's International, 84% of every dollar goes towards helping children.

That's how you know you're not just making a donation.

You're making an impact. This giving season gives something that counts. Donate today at

children.org slash give. That's children.org slash give. One of my best friends in the world is a

physicist. In college, he was completely addicted to coffee.

Every morning, he'd slowly drip milk into that black liquid. And then he would stop and wander off

as he watched the milk and coffee intermix. One day, I finally asked what was happening,

...