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natural-science

Follow sunlight into Earth's atmosphere and see why blue light spreads across the daytime sky while sunsets glow red and orange.

computing-networking

See how Wi-Fi turns your device's data into radio signals, reaches a nearby access point, and connects you to other networks.

natural-science

See how a leaf uses sunlight, water, and carbon dioxide to build sugar for the plant and release oxygen into the air.

computing-networking

Follow one internet message as it becomes addressed packets, crosses routers, and is rebuilt by the receiving computer.

natural-science

See how mass creates gravity, why objects fall toward Earth, and how sideways motion turns continuous falling into an orbit.

computing-networking

See how an encryption algorithm and key turn readable data into ciphertext that only someone with the right key can recover.

natural-science

See how extreme mass curves spacetime, what an event horizon means, why black holes do not vacuum up space, and how we detect them.

everyday-engineering

Look inside a battery to see how two electrodes, an electrolyte, moving ions, and an outer electron path power a device.

computing-networking

Learn how apps use APIs to ask other systems for data or actions through clear requests, agreed rules, and predictable responses.

everyday-engineering

See how wings turn moving air downward while lift, weight, thrust, and drag work together to keep an airplane flying.

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