Cosmic rays from outer space sound like science fiction. They’re not—invisible particles flung from outer space pass through our bodies every minute. But not all cosmic rays are equal; Some are immensely powerful and very rare. For decades scientists have wondered where they're coming from – and what could possibly be hurling them at Earth. Now, they're getting closer to finding out.  Ross Chambless has the story.

Every October 16th hundreds of people gather in Dublin to celebrate Ireland's greatest mathematician, William Rowan Hamilton. And get this – It was his act of vandalism on Broom Bridge in 1843 that put him in the history books – it actually changed mathematics forever. Samuel Hanson brings us the story.

Hurricanes Harvey and Irma left devastation in their wake all across the southern United States as unimaginable quantities of water swallowed up small towns and cities alike. But what happens to that water and how can cities better prepare ahead of time? Two years ago, reporter Jenny Chen followed two so-called flood hydrologists to learn more about the preparation.

What if the size of our dinner plate, its color, the material of our cutlery - even background sounds - all affect how our food tastes? In other words, what if it’s not just about what we cooked for dinner, but the context of the meal itself?

Reporter Quentin Cooper brings us this story.

Underneath our vrooms, beeps, and rumbles, natural sound may be more important than we think.

On May 2, 2015, beekeepers Pam Arnold and Kristy Allen got hit with a pesticide. They couldn't see it or smell it, but when they saw their bees writhing on the ground and dying they knew something was seriously wrong. They called a panel of scientists at the Minnesota Department of Agriculture.

Thirty-six-year-old twins Carol and Katy are physically identical in every way but one: Katy was born without ovaries, and wanted to start a family. The science and ethics behind ovarian transplants as a treatment for infertility.

The headlines are often full of advice for women about when they should have children. Marnie Chesterton goes digging into the fertility stats and myths for modern women. Prepare to be surprised.

Humans have always been interested in controlling the weather. In the past we used raindances and sacrifices; today we turn to science. Cloud seeding is practiced all over the world, but there's still a lot we don't know about it. Delve into the surprising history, the controversial present, and the uncertain future of cloud seeding.

Visual stylometry is a branch of mathematics that can determine the style of a particular artist’s body of work.

Head underground to hear how some of the first subways were built, and how they are built today.

This story was originally produced by Bishop Sand in 2013. It was hosted for Transistor by Genevieve Sponsler and mixed for Transistor by Josh Swartz.

Image: CC BY-SA 3.0 Adam E. Moreira | Music: Whurlywind from Podington Bear

For the next few episodes, we’re featuring select episodes from the Smithsonian’s new series, Sidedoor, about where science, art, history, humanity and where they unexpectedly overlap — just like their museums. Up first: tales of scientific deception and trickery.

For even more from Sidedoor, subscribe in iTunes or wherever you get your podcasts.

Vissarion Shebalin was not a great composer. But his music could unlock an important truth about how the brain processes music and language.

This story was produced by Tobin Low in 2015 and edited by Andrea Mustain. It was hosted for Transistor by Genevieve Sponsler and mixed for Transistor by Josh Swartz.