In this episode of Tiny Show and Tell Us, we cover why your body feels so ‘off’ at high altitudes and how we’ve evolved not to detect low oxygen levels but high amounts of carbon dioxide. Then we unpack the confusing world of molecule chirality — what it is, why it matters, and how we evolved to only have ‘left-handed’ amino acids but ‘right-handed’ DNA and RNA.

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A transcript and references for this episode can be found at acs.org/tinymatters.

How often do you think about your teeth? In this episode of Tiny Matters, we talk about how the atoms trapped within teeth can reveal what an animal ate and where it lived, and how studying teeth has helped ecologists reconstruct prehistoric food webs of megatooth sharks and retrace the steps of woolly mammoths across the Arctic. And hopefully, we’ll give you a few new reasons to appreciate your own pearly whites.

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Links to the Tiny Show & Tell story are here and here. All Tiny Matters transcripts and references are available here.

In this episode of Tiny Show and Tell Us, we explore the science behind a very catchy headline about a drug that makes mice look more youthful and increases their life expectancies. Then we shift gears to talk about a predatory unicellular organism with a swan-like neck that rapidly extends a great distance to capture prey. Researchers used origami to understand the mechanics behind this anatomical feat.

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A transcript and references for this episode can be found at acs.org/tinymatters.

Halloween is right around the corner, so what better way to celebrate than a deep dive into the ‘science’ of ghost sightings? We touch on a bit of the psychology behind these experiences and then break down the equipment people use when searching for proof that spirits float among us, and how power lines and rats in walls muddy the specter detection waters. Then we switch to something a little more corporeal, but no less weird: cyborgs. Biohybrid robots hold a lot of potential, but their ethical use, especially when human tissues are involved, need to be carefully considered.

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Links to the Tiny Show & Tell story are here and here. All Tiny Matters transcripts and references are available here.

In this episode of Tiny Show and Tell Us, we explore the unexpected ways algae (and the things that kill them) influence cloud formation. We also chat about the massive galaxy walls in our universe, including the South Pole Wall and the Sloan Great Wall, both of which are around 1.5 billion light-years long.

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A transcript and references for this episode can be found at acs.org/tinymatters.

On January 27, 1958, newspaper editor Olga Huckins sat down to write an angry letter to a friend. Olga and her husband owned a private two-acre bird sanctuary, and the previous summer the government had sprayed the pesticide DDT all over that two acres to control the mosquitos. She saw wildlife, particularly birds, getting sick and dying. The friend Olga sent the letter to was none other than Rachel Carson, who would go on to write the book Silent Spring, exposing the dangers of synthetic pesticides, including DDT, and helping push forward the modern environmental movement and the creation of the US Environmental Protection Agency.

Today on the show we’re going to talk about the history of pesticides and their deployment, and how researchers are working to develop more effective, safer pesticides. We will also take a fascinating dive into the coevolution of plants and pests, specifically insects, and what we’re learning about the effectiveness of pesticides based on hundreds of millions of years of plant and insect evolution.

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Link to the Tiny Show & Tell story is here. You can find BirdCast here. All Tiny Matters transcripts and references are available here.

In this episode of Tiny Show and Tell Us, we talk about the ampullae of Lorenzini that allow sharks to detect the electrochemical signals coming from prey. We also cover the fascinating science behind cyanide-filled clovers. Did you know cyanide is actually a very popular poison in the plant kingdom?

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A transcript and references for this episode can be found at acs.org/tinymatters.

E-cigarettes, commonly referred to as “vapes,” were invented in the early 2000s with the explicit goal of helping people quit smoking by transitioning them to something safer. But there are many people, particularly in the United States, who start vaping without ever having smoked a cigarette, leading to fears that vaping will be an on-ramp to smoking — a “gateway drug.” In fact, in the U.S. alone, nearly half a million middle school students vape. And in 2019, the CDC started receiving reports of severe and acute lung injury in people who vaped. By February of 2020, almost 3,000 people had been hospitalized and 68 people had died.

We know that smoking is deadly (in fact, it’s estimated to take about 10 years off your life), but of course vaping isn’t risk free. In this episode of Tiny Matters, we’ll dive into the science behind both to answer, “What’s more dangerous, smoking or vaping?” “And does vaping actually help people quit smoking cigarettes?” We’ll also get to the bottom of why so many people got sick or died from vaping back in 2019 and 2020, yet we haven’t seen injuries like that since.

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Link to the Tiny Show & Tell story is here. All Tiny Matters transcripts and references are available here.