The Bedtime Scientist

Josh Fleishman

Ranked the #1 Educational Podcast for Kids globally, The Bedtime Scientist is the ultimate nightly routine for busy, anxious minds. I help kids (and adults!) drift off to sleep by exploring the wonders of the universe...from the bottom of the ocean to the edges of space. Designed to be low-stimulation and sensory-friendly, this show is the antidote to chaotic screen time. ✨ What makes us different: Real Science: No fairy tales, just the fascinating truth about our world. 100% Human: No AI, no robots, and no jarring sound effects. Pure Calm: Just one soothing voice guiding you into a peacef

  1. Shooting Stars: Wishes on Ancient Dust | A Calm Scientific Sleep Journey for Kids & Adults

    2 DAYS AGO

    Shooting Stars: Wishes on Ancient Dust | A Calm Scientific Sleep Journey for Kids & Adults

    In this special New Year’s episode of The Bedtime Scientist, we turn our eyes to the night sky to uncover the quiet magic of shooting stars. If you love The Bedtime Scientist, here are two ways you can support our mission! Join our Patreon community! Get exclusive bonus episodes and episode guides for parents. ➡️⁠⁠ ⁠⁠⁠The Bedtime Scientist on Patreon⁠⁠⁠Explore our books! Your voice is most important; become the bedtime scientist for your kids. ➡️⁠⁠⁠⁠⁠Browse The Bedtime Scientist Books ⁠⁠⁠About this Episode : We often think meteors burn up because of friction, but the truth is far more fascinating. Tonight, we debunk that myth and learn about Ram Pressure—the incredible force that turns cold stone into glowing plasma. We also discover how our Earth’s atmosphere acts as a heavy, protective "ocean of air" (weighing 14 pounds per square inch!) that shields us while we dream. Whether your family is looking for a quiet alternative to loud New Year's fireworks or simply needs a calming journey into the cosmos to help drift off to sleep, this episode is the perfect guide. In this episode, your child will learn: The Truth About the Glow: Why shooting stars aren't caused by friction, but by the intense compression of air (Ram Pressure) that creates plasma hotter than fire. The Traveler’s Journey: How a tiny rock (meteoroid) travels for billions of years through the solar system before finally arriving above our heads. The Colors of Space: How to read the "chemical signature" of a meteor based on its color—White (Magnesium), Yellow (Sodium), Green (Nickel), and Orange (Iron). The Invisible Shield: A comforting visualization of our atmosphere as a protective blanket that keeps us safe and warm. Space Vocabulary: The difference between a Meteoroid, a Meteor, and a Meteorite. Why this episode helps with sleep:New Year's Eve can be a time of high energy and anxiety for children. The concept of "change" can be unsettling. This episode reframes the New Year not as a disruption, but as an "Orbital Return"—a comforting reminder that we have completed a safe journey around the sun and are returning to our cosmic neighborhood. We use the metaphor of the Earth's atmosphere as a protective shield to create a somatic sense of safety ("The Bunker Effect"), helping to lower cortisol levels and induce deep, restful sleep. Key Science Concepts: Ram Pressure (Adiabatic Compression) Plasma Physics Atmospheric Pressure (14 PSI) The composition of the Early Solar System Meteor Showers (Perseids, Geminids) A Note for Parents:This episode is designed to be listened to in the dark. The pacing is intentionally slow, utilizing lower frequencies and reduced sibilance to prevent wakefulness. It is perfect for children who are fascinated by space but prone to bedtime anxiety. Keywords: Bedtime stories for kids, science for kids, astronomy for kids, shooting stars explained, what is a meteor, ram pressure physics, sleep meditation for kids, calming bedtime routine, New Year's Eve for kids, space facts, anxiety relief for children, sleep sounds, educational podcast for kids, STEM for kids, gentle parenting, soothing voice, meteor shower.

    15 min
  2. Thunder & Lightning: The Sky's Electric Lullaby | Meditatively Beautiful Anxiety Reducing Science

    6 DAYS AGO

    Thunder & Lightning: The Sky's Electric Lullaby | Meditatively Beautiful Anxiety Reducing Science

    ⭐️ If you love The Bedtime Scientist, here are two ways you can support our mission! Join our Patreon community! Get exclusive bonus episodes and episode guides for parents. ➡️⁠The Bedtime Scientist on Patreon⁠Explore our books! Your voice is most important; become the bedtime scientist for your kids. ➡️⁠Browse The Bedtime Scientist Books ⁠ Thunder & Lightning: The Sky's Electric Lullaby - Calm bedtime science If storms scare you, you're not alone. In this episode, we discover how understanding transforms fear into wonder. Through gentle science and poetic narration, drift into sleep while learning how storms truly work—from the quiet dance of billions of ice crystals inside a cloud to the brilliant flash of lightning that feeds the Earth. Thunder isn't a warning. It's a messenger. And lightning? It's the sky's way of caring for every living thing below. 🤫 What we promise: No sudden sounds. No bright flashes. Only calm narration and the gentle truth about why storms are beautiful. ✨ What you'll learn: How lightning forms inside a cloud (and why it's seeking balance, not anger)Why thunder is actually a messenger, not a warningHow storms secretly help every plant and tree on Earth grow Perfect for curious kids, restless nights, and anyone learning that understanding transforms fear into wonder. This is science told softly...storms become lullabies...fear becomes curiosity... Thank you to Nate C. from Lower Merion, PA, for suggesting this fantastic topic.

    13 min
  3. Bioluminescence: Nature's Living Light... Calm Sleepy Nonfiction Science Sensory Friendly

    30/12/2025

    Bioluminescence: Nature's Living Light... Calm Sleepy Nonfiction Science Sensory Friendly

    ⭐️ If you love The Bedtime Scientist, here are two ways you can support our mission! Join our Patreon community! Get exclusive bonus episodes and episode guides for parents. ➡️⁠⁠ ⁠The Bedtime Scientist on Patreon⁠Explore our books! Your voice is most important; become the bedtime scientist for your kids. ➡️⁠⁠⁠Browse The Bedtime Scientist Books ⁠⁠ Just a real dad...NO AI/Silly Voices/Characters/SFX Tonight, we explore one of nature's most magical phenomena: bioluminescence—the ability of living creatures to make their own light. We begin in a summer backyard, watching fireflies blink their coded messages into the dusk. Then we descend into the deep ocean, where nearly every creature glows—some to hunt, some to hide, and some to escape in a shimmer of sparkling light. Through gentle science and soothing imagery, we discover how the anglerfish uses a living lantern, how creatures erase their shadows with light, and how the vampire squid creates underwater confetti to vanish like a tiny magician. This episode transforms darkness from something to fear into something full of wonder, quiet work, and beautiful light. ✨ What you'll learn: How bioluminescence works (the chemistry of "living light")Why fireflies flash in patterns and codesThree ways deep-sea creatures use light to surviveThe science of counterillumination (hiding by glowing) 🩵 Perfect for:Curious minds who love ocean science, children who are fascinated by fireflies, and anyone seeking a gentle journey into the peaceful depths of the sea.

    11 min
  4. Airplane Turbulence: The Sky’s Rockabye | Gentle Physics for Sleep & Flying Anxiety

    28/12/2025

    Airplane Turbulence: The Sky’s Rockabye | Gentle Physics for Sleep & Flying Anxiety

    Be sure to follow and rate the show! Download this episode for the airport and plane! Does the thought of a bumpy flight make your stomach tighten? Whether you are a nervous flyer, a curious kid, or just trying to sleep in a hotel room before a big trip, this episode is your safety anchor. Tonight, we take the fear out of turbulence by looking at the physics behind it. We strip away the chaos and reveal the "River of Air"...the invisible fluid that supports an airplane just like water supports a boat. In this episode, you’ll learn: The Boat on the Lake: Why bumps in the sky are no different than waves on a quiet pond. The Willow Wing: Why airplane wings are designed to bend (and why stiffness is actually weaker than flexibility).Earth’s Warmth: How sunlight and thermals create the invisible currents we call turbulence. There are no scary moments here. Just the rhythm of the atmosphere, the wisdom of engineering, and a lullaby written in the laws of physics. Perfect for: Nervous flyers (kids and adults).Sleep during travel or in hotel rooms.Anyone fascinated by how flight actually works.⭐️ If you love The Bedtime Scientist, here are two ways you can support our mission! Join our Patreon community! Get exclusive bonus episodes and episode guides for parents. ➡️⁠⁠⁠The Bedtime Scientist on Patreon⁠⁠⁠Explore our books! Your voice is most important; become the bedtime scientist for your kids. ➡️⁠⁠⁠Browse The Bedtime Scientist Books ⁠⁠

    16 min
  5. Snowflakes: Winter's Quiet Blanket | Calm Holiday Bedtime Science for Kids & Adults

    24/12/2025

    Snowflakes: Winter's Quiet Blanket | Calm Holiday Bedtime Science for Kids & Adults

    Have you ever caught a snowflake on your mitten and watched it vanish in the blink of an eye? Something that delicate, built with such intricate care, lives for only minutes—not hours. Tonight on The Bedtime Scientist, we slow down time to live that tiny life. We trace the journey of a single crystal from the moment it appears in the sub-zero clouds to the moment it lands to quiet the world. This isn't just a story about winter; it is a deep dive into the molecular physics that shape our world. In this episode, we explore: 1. The Miracle of DepositionMost of us learn that water freezes from liquid to solid. But high in the atmosphere, something else happens. We explain deposition—the process where water vapor jumps straight from invisible gas to solid crystal, skipping the liquid phase entirely. It is a moment of instant transformation, where a water molecule locks onto a dust grain and decides, without hesitation, exactly what it wants to be. 2. The Geometry of the HexagonWhy do snowflakes always have six sides? We break down the atomic "rules" of water. You’ll learn about hydrogen bonds—the "hands" water molecules use to hold onto each other. We visualize how oxygen and hydrogen atoms arrange themselves in a perfect 120-degree geometry, creating the hexagonal lattice structure that has defined ice for billions of years. 3. The "Sky Diary" & DendritesAs the snowflake falls, it keeps a diary. Every branch and flat plate is a record of the temperature and humidity it passed through. We discuss dendrites (tree-like branches) and the mystery of symmetry: how six separate arms, with no nervous system or blueprint, manage to grow in perfect synchronization, painting the exact same picture without ever seeing one another. 4. The Physics of Silence (The "Quiet Button")Have you ever noticed the heavy, peaceful silence that blankets the world after a snowstorm? That isn’t just a feeling; it’s physics. We explain how fresh snow, which is mostly air trapped in an ice lattice, acts like an acoustic sponge. We dive into how these tiny pockets absorb sound waves, acting as nature’s insulation to dampen the noise of the world. 5. The Warmth of IceFinally, we look at the paradox of snow: it is made of ice, yet it acts as a blanket. We explain how the trapped air within the snowpack prevents heat from escaping the soil, keeping seeds, roots, and small creatures safe and warm through the winter. A Note for the Listener:This episode touches on a quiet truth about us. Just like snowflakes, our lives are shaped by the "weather" we fall through. Maybe you’ve felt broken, lopsided, or imperfect. But in the physics of snow, every crystal—whether perfect or broken—lands. They all join the blanket. They all create the quiet. Key Vocabulary: Deposition: Phase transition from gas directly to solid. Nucleation: Freezing around a particle (like dust). Hydrogen Bonding: The attraction between water molecules. Dendrites: The branching structures of a snow crystal. Acoustic Attenuation: The absorption of sound energy. Support The Mission The Bedtime Scientist is about the calm, confident analysis of the world. It takes time, research, and expertise to turn complex data into a clear path toward sleep. If the quiet wonder of this show is essential to your family’s routine, please consider becoming a partner in my mission on Patreon. Your contribution ensures that this ad-free, deep-dive science keeps coming every week. For More, Check Out: ⁠⁠https://www.bedtimescientist.com/ ⁠⁠ ⭐️ If you love The Bedtime Scientist, here are two ways you can support our mission! Join our Patreon community! Get exclusive bonus episodes and episode guides for parents. ➡️⁠⁠⁠The Bedtime Scientist on Patreon⁠⁠⁠Explore our books! Your voice is most important; become the bedtime scientist for your kids. ➡️⁠⁠⁠Browse The Bedtime Scientist Books ⁠on Amazon

    12 min
  6. Winter Solstice: Why it's Cold in Winter | Calm Non-Fiction Bedtime Science for Kids & Adults

    21/12/2025

    Winter Solstice: Why it's Cold in Winter | Calm Non-Fiction Bedtime Science for Kids & Adults

    Have you noticed how the world is getting dark before dinner is even on the table? The shadows stretch longer across the floor. The streetlights wake up earlier each evening. It can feel like night is settling in to stay. At The Bedtime Scientist, we do not provide stories. Our function is to interpret data and turn it into a clear, actionable plan for your rest. Tonight, Josh reframes the confusion of winter with a calm, confident analysis of planetary mechanics—so you can understand the exact moment when the light begins its inevitable return. To understand winter, we have to leave the ground in our minds. Imagine looking back at Earth from space: a blue and white marble turning peacefully in the cold. We often picture our planet standing straight, but the data tells a different story. The Earth is actually leaning back, much like a person resting in a comfortable chair. Scientists have measured this lean with precision: it is exactly 23.5 degrees. This is not a random wobble or a sign of chaos. It is a steady, intentional tilt. When it is winter where you live, your part of the planet is simply leaning away from the sun, resting in the cool shadow of space. Because of this 23.5-degree tilt, sunlight has to travel much farther to reach us. It arrives at a low angle, skimming across the surface of the Earth like a stone skipping across water. To understand why the air feels cold, picture this: if you shine a flashlight straight down on a floor, the circle of light is bright, tight, and powerful. But if you tilt that flashlight and let the beam slide across the floor at an angle, that same light spreads out. It becomes thinner, softer, and weaker. This is what is happening right outside your window. The sun has not abandoned us. Because of our tilt, that same solar energy is being spread thinner across the ground. It is a seasonal softening of light—a temporary lean that has been functioning perfectly for billions of years. The word "solstice" is an ancient term that means "sun still." To visualize this, imagine a swing rising higher and higher into the sky. As it climbs, there is a tiny, perfect moment at the very top of its arc, right before it swings back down, where it isn't moving forward or backward. It is perfectly still. It is hanging in that instant between motions. That is what happens on the winter solstice. The Earth reaches the deepest point of its lean. For that moment, the shortening of days stops. The tilt pauses. The universe holds its breath. But even in that stillness, the machinery of the universe continues to turn. Gravity holds the Earth close. The planet is turning us back toward the light with a movement so precise that our best instruments are just witnesses to its perfection. Tonight, you can feel safe in the dark. What is happening is not randomness. It is a system. The Earth is steady, stable, and reliable. It knows exactly how to spin and exactly when to meet the dawn. It has been doing this for more than four billion years—four billion cycles of rotation and return. The heavy work of your safety is already being done for you by a planet that has been dancing this same gentle loop since before humans existed. Everything is on track. Everything is on time. You can let go now because the system is functioning exactly as it should. The light will return, and you will wake to a world that is exactly where it is supposed to be. ⭐️ If you love The Bedtime Scientist, here are two ways you can support our mission! Join our Patreon community! Get exclusive bonus episodes and episode guides for parents. ➡️⁠⁠⁠⁠The Bedtime Scientist on Patreon⁠⁠⁠⁠Explore our books! Your voice is most important; become the bedtime scientist for your kids. ➡️⁠⁠⁠⁠Browse The Bedtime Scientist Books ⁠⁠⁠⁠Understanding Winter from Space, Why the Light Feels Weaker. The Solstice: The Universe Holding Its Breath, You Are Safe in the Dark

    10 min

About

Ranked the #1 Educational Podcast for Kids globally, The Bedtime Scientist is the ultimate nightly routine for busy, anxious minds. I help kids (and adults!) drift off to sleep by exploring the wonders of the universe...from the bottom of the ocean to the edges of space. Designed to be low-stimulation and sensory-friendly, this show is the antidote to chaotic screen time. ✨ What makes us different: Real Science: No fairy tales, just the fascinating truth about our world. 100% Human: No AI, no robots, and no jarring sound effects. Pure Calm: Just one soothing voice guiding you into a peacef

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