Topher White founded the nonprofit Rainforest Connection with the intent of creating a low-cost monitor that could help remote communities in their efforts to halt illegal logging, which is an enormous threat to tropical habitats. As it turns out, the best way to track people who are cutting down trees is sound. Using old cell phones linked to an artificial-intelligence platform in the cloud, White developed a system that can detect chainsaws in real time and send automated alerts to authorities. Today, Rainforest Connection is recording audio continuously from over a 1,000-square-miles of forest across 12 countries. That scale, along with rapid improvements in machine learning, have opened up tantalizing possibilities for understanding what the sounds of nature really mean.

Every winter, the Pacific Ocean produces massive swells that roll across the open sea and crash into the Hawaiian island of Oahu. For more than 50 years, the surf world has gathered here, on the North Shore, along a stretch of legendary beaches that are collectively known as the Seven Mile Miracle. A lot of drama is to be expected: epic rides, agonizing wipeouts, and every so often, a heroic rescue. In this episode, we share two stories from the latter category. One comes from photographer-filmmaker Jeff Johnson, who, back in the day, was a young lifeguard at Sunset Beach, determined to prove himself. The other is from big-wave rider Kohl Christensen, a North Shore local whose work to safeguard the lives of other surfers recently ended up saving his own.

Conservationists hoping to protect a threatened wild species tend to take a standard set of actions. These can involve political campaigns, lawsuits, and media outreach. But sometimes it’s the unexpected approaches that can make the difference. Over the past several years, artist Jane Kim has been creating large-scale public murals of the monarch butterfly, an insect that’s in a state of crisis. Recent surveys indicate the that the population of the western monarch in California has plummeted to below 30,000, down from 4.5 million in the mid-1980s. Kim’s latest work is a painting in San Francisco's Tenderloin district that wraps three sides of a 13-story building and includes a 50-foot-tall monarch. It’s suddenly one of the most dramatic features in the city’s skyline. The question now is whether this extraordinary piece of public art will spur the actions really needed to save the species—or become a tribute to a once beautiful butterfly.

In today’s fitness space, self-experimentation is the name of the game. All kinds of people are embracing new technologies and diets in the hope of finding faster strategies for getting in the best possible shape. In this crowd, few are pushing things further than Ben Greenfield. The exercise physiologist and personal trainer has made his mark by exploring the limits of what seems reasonable (Example A: injecting his penis with stem cells) and voicing controversial ideas, including skepticism about standard vaccination practices. In his new book, Boundless: Upgrade Your Brain, Optimize Your Body & Defy Aging, he covers almost anything you might want to know about being the fittest and healthiest you can be. For this episode, Outside editor Chris Keyes speaks with Greenfield about strategies for better sleep, the upsides of cold therapy, the problems with gym workouts, and more.

At some point, almost every skier or snowboarder who has sat on a stalled chairlift has wondered, Could I just jump off here? The resounding reply from the experts is no, no, no. Don’t jump off the chairlift. Not ever. In addition to the high risk of getting injured yourself, you’re putting the people on other chairs around you in danger in ways you don’t understand. So stay put, and wait for the lift to restart. Or, in those rare instances when the chair really is broken, wait for ski patrol to get you down. But there are those truly unique cases when breaking the rules may be the only option. In this episode, we tell the story of very unlucky snowboarder who was forced to make the worst kind of choice. 

Ask scientists about the aurora borealis and they’ll explain that the spectacular display of lights we see in the wintertime sky is caused by solar winds that send charged particles into the earth’s upper atmosphere, where they smash into gases. But witness this otherworldly show yourself, and ancient beliefs about magic often feel more true. It was the magic that mattered to Hugo Sanchez, a self-taught photographer who fled civil-war-torn El Salvador and moved to Canada. But tragedy followed him, and it was chasing the perfect shot of the northern lights that gave him a new sense of purpose.

As host of one of the most popular interview shows in the podcast universe, Rich Roll is known for his limitless empathy. That approach grew out of his long personal journey. A talented college swimmer, he developed an alcohol problem that later destroyed his first marriage and nearly derailed his career as a lawyer. He sobered up but became a miserable workaholic, until, at age 40, he went vegan and started endurance training. Soon he was a top finisher at the Ultraman, an infamous sufferfest in Hawaii. On his weekly show, Roll interviews everyone from elite athletes to spiritual leaders to bestselling authors, all in the interest of empowering the rest of us to make better decisions. In this episode, he shares his inspiring story and the many hard lessons learned.

It’s around this time of year that we tend to ask ourselves the big questions: Am I living the life I want to be living? Am I a good a person? And, of course, is this going to be an epic ski season, or a bust? This week, we present a story that miraculously addresses all of these questions. It comes to us from the good folks at the Dirtbag Diaries, and has outdoor industry veteran Dan Kostrzewski sharing a very personal tale about a skiing accident with his young daughter, and how it helped him gain a new perspective on the sport that has long been at the center of his personal and professional identity.

Of the many story lines that came of the New York Marathon this November, perhaps the most inspiring was the performance of Kikkan Randall. The 35-year-old was racing in her first-ever marathon, yet she finished 51st among all women and 12th in her age group. It was impressive, even for Randall, one of the most accomplished cross-country ski racers in American history, especially when you consider that just 18 months earlier, she’d been diagnosed with Stage II breast cancer. *Outside *contributor Stephanie Joyce talks to Randall about her pattern of coming back stronger from tough times and failure, and where she goes from here.

Search a major online music platform for “nature” and you get a lot of stuff designed to help you relax. Recordings of chirping rainforest creatures, gently tumbling waves, a pulsing didgeridoo—it’s what you expect to hear during a massage treatment. The reality, of course, is that nature is often far from tranquil. It can be barbaric, dissonant, and downright metal. In that spirit, this week’s episode presents two tales that pay homage to nature’s thrasher tendencies. The first involves a threatening predator that was fought off with Metallica. After that, we’ll hear from a professional hard rocker who attempted to be the hero of a shipwrecked crew, and shared his experience at a live storytelling event hosted by The Moth.