4Ps

Weeds are usually the plants we pull, mow, spray, curse, or ignore — but what if we looked closer? In this episode of 4Ps: Plants, Pests, Parasites and People, Dr. Kate Martin explores what actually makes a plant a weed, why weeds matter in agriculture, and how they can act as reservoirs for insects, viruses, fungi, bacteria, nematodes, and genetic diversity. From Palmer amaranth and waterhemp to...

In this episode of 4Ps: Plants, Pests, Parasites and People , Dr. Kate Martin returns to the “Pest” part of the cycle with a Most Wanted list of ten invasive insects currently shaping forests, farms, backyards, and regulatory programs in the United States. The episode defines what “invasive” actually means, explains how an insect makes the list, and walks through each case file: classification, cu...

For this episode of 4Ps: Plants, Pests, Parasites and People , Dr. Kate Martin follows the strange, moldy, world-changing story of penicillin: from accidental observation to lifesaving medicine, and from one famous petri dish to a much larger cast of scientists, patients, and microbes. Along the way, we look at how antibiotics changed medicine, why fungi are such astonishing chemists, and why resi...

South Florida’s tropical fruits are not just a glamorous little collection of produce that happens to like warm weather. They are really a lesson in how growing something and growing it well are not at all the same thing. Avocado, mango, lychee, longan, mamey, banana, passionfruit, and dragonfruit all bring their own baggage, frankly, whether that is drainage issues, flowering quirks, storm damage...

In this episode of 4Ps, Dr. Kate Martin takes a closer look at cockroaches, the insects people think they already understand. From their strange biology and surprising diversity to the major pest species found around human spaces, this episode explores what cockroaches actually are, how they succeed so well alongside us, and why their reputation only tells part of the story. Unsettling, scientific...

In this episode of 4Ps: Plants, Pests, Parasites and People, Dr. Kate Martin explores Cauliflower mosaic virus (CaMV)—a plant virus most people have never heard of, but one that quietly shaped modern plant science. From haunted-looking brassica leaves and aphid transmission to the famous CaMV 35S promoter, this is the story of how a crop disease became one of the most widely used molecular tools i...

What changed medicine forever wasn’t a new drug or a sharper scalpel, it was learning to believe in an enemy we couldn’t see. In this episode of 4Ps: Plants, Pests, Parasites & People, Dr. Kate Martin tells the messy, human story behind germ theory: from “bad air” and public panic to cholera maps, hospital handwashing, pasteurization, antiseptic surgery, and the tools that eventually made viru...

In this episode of 4Ps, Dr. Kate Martin dives into forensic botany, the real science of how plants can quietly place us in environments we didn’t realize we were carrying with us. From pollen “profiles” that hint at season and habitat, to burrs and seeds that hitchhike on clothing, to plant fragments and disturbed vegetation that can reveal contact and movement, nature leaves traces everywhere. An...

The black widow isn’t a cartoon villain—and she’s not coming for you. She’s an introverted, venomous roommate with incredible silk tech and a wildly misunderstood love life. Dr. Kate Martin separates myth from reality: where widows live, how they hunt, why bites happen, what pesticides change in their world, and why their venom is a research tool, not a morality play.

In this episode of 4Ps, Dr. Kate Martin reflects on the lingering personal cost of COVID—and then travels back to history’s most infamous pandemic: the Black Death. How did plague spread so fast, what does infection look like in the human body, and why does it still matter today? We’ll follow Yersinia pestis through fleas, lungs, quarantine islands, and trade routes—and end with the haunting quest...

In this episode of 4Ps: Plants, Pests, Parasites & People , Dr. Kate Martin explores alchemy as more than a weird wrong turn in science—it's a thousand-year, globe-spanning attempt to “hack reality” in a world of disease, instability, and miracle-sized hopes. From Egypt and China to South Asia, the Islamic world, and medieval Europe, she follows how ideas traveled on trade routes, how patronag...

Yarrow is one of those plants you’ve probably walked past a hundred times without noticing—and that’s exactly why it mattered. In this episode of 4Ps, Dr. Kate Martin follows Achillea millefolium from roadside “boring white wildflower” to one of the most reliable pieces of historical first aid: a plant people reached for when there was blood, dirt, and no modern medicine. Along the way we unpack t...

Today’s episode starts with a very specific kind of desert memory: growing up in Northern Nevada, riding out in a jeep to hunt fossils, and accidentally driving straight into what I can only describe as a wall of bugs—Mormon crickets—so thick the tires went crunch, crunch, crunch and the road turned slick like summer ice from pure cricket sludge. That year sent me down a rabbit hole of insect crow...

Wheat made civilization possible. Wheat rust made it complicated. We explore the fungus behind one of agriculture’s most notorious diseases—how it spreads, why it evolves so fast, and what it reveals about farming, ecology, and food security.

In Season 1, Episode 3 of Four Ps: Plants, Pests, Parasites & People , Dr. Kate Martin tackles a question that sounds simple and absolutely isn’t: what makes us human? Using student answers as the guide, the episode moves from bipedalism and its ripple effects (free hands, tools, hard births, helpless babies, and cooperative caregiving) into what genetics and gene regulation may have changed i...

In this episode of 4Ps: Plants, Pests, Parasites and People , Dr. Kate Martin explores how humans transformed wild plants into dependable food crops through the slow process of domestication. Using the common bean as a main example, the episode unpacks the key traits people (often unintentionally) selected for over generations—like pods that don’t shatter and scatter seeds, growth habits that make...

In a story about how life bends the rules to survive, we start with the social ecosystem of “rule followers vs. rule breakers” and then zoom in on one of biology’s strangest rebels: the bedbug: a blood-feeding, wingless hitchhiker with an odd life cycle, brutal mating strategy, and a knack for thriving anywhere from mattresses to cage-free and free-range poultry houses. Along the way, you’ll hear...