The Pulse

On this encore episode, we explore the world of color — from how we perceive it, to our efforts to describe and differentiate its many shades. We talk with a lexicographer about efforts to standardize synthetic colors, and how we describe them, and investigate how we know that the colors we see are the same as the ones everyone else sees.

The Pulse host Maiken Scott adds some pops of color to her all-black wardrobe with help from Jill Rafter, a color consultant with House of Colour, who breaks down seasonal palettes and how to choose your ideal hues based on your skin’s undertones.

We talk with lexicographer Kory Stamper about her deep dive into the origins of ultra-specific color definitions, and the fascinating history of how major global changes, ranging from industrialization to international warfare, led to a government effort to standardize not just the production of synthetic colors, but also how we talk about them. Stamper’s new book is “True Color: The Strange and Spectacular Quest to Define Color – from Azure to Zinc Pink.”

How do we know that the colors we see are the same as the colors other people see? Pulse reporter Liz Tung talks with University of Pennsylvania researcher David Brainardabout the science of how we perceive color, what we know — and don’t know — about our shared perceptions, and the philosophical questions this raises about the nature of subjective experience.

Pulse producer Nichole Currie talks with Cricket Matthews, who experiences  grapheme-colors synesthesia, a unique neurological trait in which letters, numbers, and words trigger specific colors in your mind.

Cereal was born as a health food — but quickly, sweet, crunchy flavor, bright colors, and fun shapes became more important than the nutritional value. That didn’t stop cereal companies from leaning into health claims, though.  From Cheerios to Frosted Flakes and Wheaties, brands made bold promises to lower cholesterol, promote weight loss, boost fiber and even help prevent cancer. These healthy messages were also paired with eye-catching designs and beloved mascots. It was all a powerful marketing formula, one that sold a dream to buyers — that indulging in sugary cereal could also be a healthy choice. But, over the years, the healthy veneer has chipped off the cereal box.

On this episode, public health nutritionist Marion Nestle and former Vice President of Nutrition at Kellogg Company Lisa Sutherland discuss their new book, “Sugar Coated: Unboxing the Hidden Forces Shaping America’s Favorite Breakfast Food.”

We all know we’re supposed to eat healthy — but what exactly does that mean? On this episode, what’s on your plate, why it matters, and how to make sense of conflicting nutrition advice. We talk with paleoanthropologist Daniel Lieberman about what human evolution can teach us about how we should eat, look at a typical teen’s sugar intake, and explore barriers to serving healthy and fresh school lunches.

We all know we’re supposed to limit our sugar intake — but tracking how much we’re actually eating can be hard, especially given how many products, ranging from pasta sauce to salad dressing, contain added sugars. We talk with recent high school grads Joe Faranda and Jay Lopez about what they discovered after tracking their sugar intake for a week.

It's a question we ask ourselves every day, multiple times a day: What should I eat? The answer has gotten increasingly complicated over the years, as our food options have ballooned, and dietary advice shifts. We talk with evolutionary biologist Daniel Lieberman about why humans are poorly adapted to decide what to eat, how our diets — and the way we think about them — have changed, and why nutrition labels don't give the full story. Lieberman’s new book is “Fed Up: What Evolution Reveals About Food, Diet, Health and Eating Well.”

Growing research on the negative health effects of ultra-processed foods has led to a call for healthier school lunches — but what does that really mean, and what would it require? Reporter Megan Myscofski visits a California school district that provides nutritious, locally sourced meals that are mostly made from scratch  — and finds out why similar efforts are out of reach for many districts.

As summer winds down, some people are celebrating the approach of fall, while others are dreading the shorter, colder days. We know that weather can affect our mood — maybe we're extra irritable when it's hot, or gloomy when it's gray — but it can also influence our overall health. On this episode, a look at how weather affects well-being and health, from its impact on menstrual cycles to chronic conditions like asthma and pain.

Can extreme heat affect your menstrual cycle? The internet thinks so. In June, , a strange phenomenon went viral on social media — thousands of women experienced unexpected changes to their periods as temperatures soared. For some, it came early; for others, late. Still others missed it entirely, or reported having a second period shortly after their first. Pulse producer Nichole Currie investigates the potential connection.

Writer Alison Espach was taking a dip in the ocean one summer when something strange happened — she emerged covered head-to-toe in hives. She dismissed it as a fluke, but then it happened again when she swam in a lake, and again in a river. We talk with Espach about the bizarre culprit: her sudden allergy to cold. 

Heat waves don't just make for uncomfortable temperatures — they often lead to poor air quality, which, in many places, has been exacerbated by wildfires. Pulse reporter Alan Yu talks with patients affected by air pollution, why it's dangerous to our health, and the people working to better track air quality.

We talk with writer Lorraine Boissoneault about her new book of essays, "Body Weather: Notes on Chronic Illness in the Anthropocene," which explores the ways in which her own chronic illnesses mirror the weather changes wrought by climate change.

Psychologist Trevor Harley explains the science of how the weather affects our mental and physical health, the evolutionary roots of our sensitivity to the weather, and how we can use that knowledge to improve how we feel. His new book is “Head in the Clouds: How the Weather Affects Our Minds and Mental Health.”

A judge declared a mistrial in the murder trial of Lindsay Clancy after jurors said they were deadlocked over whether she should be held criminally responsible for strangling her three children in January 2023: Cora, 5, Dawson, 3, and Callan, who was just 8 months old. 
The shocking case touched a nerve with millions of people who have been following the trial and asking: How could a mother kill her three young children? 
British journalist Katinka Blackford Newman also followed the trial closely, but she has a different perspective. She says her own story could have ended up like Clancy’s. Newman describes how she became completely delusional after experiencing adverse effects to psychiatric medications. Quickly, her perfectly ordinary life went completely off the rails and teetered on the edge of catastrophe. 
Later, we’ll discuss postpartum psychosis, a condition Clancy’s defense team said she was experiencing at the time of the murders. Susan Hatters-Friedman, a psychiatrist specializing in maternal mental health, weighs in on diagnosis and treatment of postpartum psychosis and the conversations happening around the trial.