Sagittarius A*How a black hole bends time
Two clocks, the fall, light bending around the hole, the frozen image at the horizon, the crossing, and other black holes.
SpaceX Raptor 3How a rocket engine works
Propellants, turbopumps, the full-flow cycle, the combustion chamber, the nozzle in thinning air and a Super Heavy launch.
Human heartHow the heart works
Four chambers, four valves, the pressure curve, the pacemaker inside and what happens when you run.
ATP synthaseHow ATP synthase works
Proton push, the rotor ring, the three seats, sprint versus marathon, training.
Solar panelHow a solar panel works
The sun's path, the layer stack, the silicon junction, cells in series, the inverter.
Mechanical watchHow a mechanical watch works
Mainspring, gear train, lever escapement, balance and hairspring, hands.
Follow the drill from the deck to the oilHow an oil rig works
Floating rigs, drill pipe, mud pressure and the trap that holds the oil.
Follow the light from lamp to eyeHow a microscope works
Lenses, two-stage magnification and the smallest detail light can show.
A soaring flight, sped upHow a glider flies
Staying up with no engine: glide, thermals, clouds, ridges and waves.
The lockstitch, slowed downHow a sewing machine works
The needle loop, the rotary hook, thread tension and the feed.
The helicopter rotor, slowed downHow a helicopter flies
Rotor lift, collective pitch, the tail rotor and forward flight.
The four-stroke engine, opened upHow an engine works
An interactive, slowed-down look inside a four-stroke engine: strokes, valves, ignition, the crank, compression, petrol against diesel and the inline four.- More explainers are on the way.