How do babies get papa's genetics?
Thomas asks how babies get papa’s genetics. We explain sperm, egg, genes, and how babies get a mix from both parents.
2026 episodes (13)
How are hardcover books made? How did the covers get so hard?
Luna asks how hardcover books are made and why the covers feel hard. We explain signatures, text blocks, stiff board, cover paper, and endpapers in a kid-friendly way.
Why can't we put our elbows on the table when we eat?
Luna asks why we cannot put our elbows on the table when we eat. The episode explains that elbows take up space, cause bumps, and make shared meals less comfortable, so keeping them off the table is a simple way to be considerate.
How do traffic lights know when to turn red? Do they have eyes?
Luna asks how traffic lights know when to turn red, and whether they have eyes. In this episode we explain timers, sensors, and tiny traffic-control computers.
How come old people get white hair?
Luna asks why old people get white hair, and the answer turns out to be a little color factory inside each hair follicle slowing down over time. White and gray hair are just hair with less pigment, not broken hair.
How do plants grow from seed to roots and flowers?
Luna asks how plants grow. We follow the whole journey from seed to roots and sprout to leaves and flowers, with a friendly look at germination, photosynthesis, and pollination.
Why does there have to be a hole in a guitar?
Luna asks why acoustic guitars have a hole. We explore how the strings, wood, and air work together to make the guitar louder, warmer, and able to sing.
Why Does Spicy Food Feel So Prickly? Why Is There Even Spicy Food in the World?
Luna asks why spicy food feels prickly and why spicy food exists at all. In this episode, we explain capsaicin, nerve alarms, and why plants make spicy peppers in the first place.
How do we make milk cartons out of skinny thing materials?
Luna asks how milk cartons are made from flat, skinny materials. We explore paperboard, thin leak-stopping layers, folding, sealing, and the big factory machines that turn flat sheets into a strong box.
Do Chickens Poop?
Luna asks: Do chickens poop? This kid-friendly episode explains that chickens do poop, why birds waste looks a little different, and why keeping a chicken coop clean matters.
Why Is the Sky Blue? Who made it blue? Why is it not any other color?
Luna asks why the sky is blue, who made it blue, and why it is not any other color. This episode explains how sunlight and air scatter light to make the daytime sky look blue, and why sunsets glow red and orange.
Why does fog and clouds have different names if they’re the same thing?
Luna asks why fog and clouds have different names if they’re basically the same thing. In this episode, we explain that both are made of tiny water droplets — the only big difference is where they are.
Why can't we walk when our spine is broken?
A gentle explainer for kids about what the spine does, what happens when it breaks, and how doctors help.