We go back almost 100 years, to the beginning of women's inclusion in elite sports. It turns out that men had an odd variety of concerns about women athletes. Some doubted these athletes were even women at all. And their skepticism resulted in the first policies requiring sex testing. Tested is a six-part series, you can binge all the episodes now in the Embedded podcast and the CBC feed.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

New from NPR's Embedded podcast and CBC in Canada: Would you alter your body for the chance to compete for a gold medal? That's the question facing a small group of elite athletes right now. Last year, track and field authorities announced new regulations that mean some women can't compete in the female category unless they lower their body's naturally occurring testosterone levels. You'll meet one of those runners, Christine Mboma, a reigning Olympic silver medalist, and hear about the difficult choice she faces. Tested is a six-part series, you can binge all the episodes now in the Embedded podcast and the CBC feed.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

Sometimes the holidays are filled with the people you love. Other times, they're marked by an absence. In this special holiday episode, new Code Switch co-host and former Invisibilia producer B.A. Parker tells a story about family, loss and preserving memories before it's too late. Then Parker joins Kia and Yowei to reflect on the making of this story, and what it means to her now.

As a parent, what do you do when your four-year-old starts telling you about memories that can't possibly be his? Memories that he says are from a past life?