Digital Life
How Do Inkjet Printers Work?
An inkjet printer builds an image from tiny droplets ejected through hundreds or thousands of nozzles. Electronics convert page data into a raster map,…
Oct 15, 2026 • 3 min readTHE NEXT FRONTIER
Technology & AI
Explore technology and artificial intelligence, examining how systems work, where they are useful and what their limitations mean.
EDITOR’S PICK
How Artificial Intelligence Actually Learns
AI learns by adjusting parameters to reduce errors—not like a human mind. Explore data, loss, backpropagation, transformers, evaluation and bias.
Sep 16, 2026 • 7 min readRead the discovery →LATEST
Latest discoveries
New stories, explanations and research from Technology & AI.
Technology & AI
How Do Seat Belts Lock During a Crash?
A three-point seat belt stores webbing on a spring-loaded retractor so it can extend slowly during normal movement. Emergency-locking mechanisms respond either to rapid…
Oct 15, 2026 • 3 min read
How Things Work
How Do Refrigerators Keep Food Cold?
A refrigerator does not manufacture cold. Its sealed vapour-compression system circulates a refrigerant through an evaporator, compressor, condenser and expansion device. The refrigerant absorbs…
Oct 14, 2026 • 3 min read
How Things Work
How Do Smoke Detectors Work?
Smoke alarms detect airborne products of combustion rather than heat alone. Photoelectric alarms use a light source and sensor arranged so smoke particles scatter…
Oct 14, 2026 • 3 min read
How Things Work
How Do Electric Kettles Know When to Turn Off?
Most basic electric kettles switch off when steam from boiling water travels through a channel to a thermostat near the base or handle. The…
Oct 14, 2026 • 3 min read
Digital Life
How Do Touchscreens Know Where You Touched?
Most modern phones use projected-capacitive touchscreens. Transparent conductive electrodes form rows and columns beneath the glass. Electronics repeatedly measure capacitance at their intersections. A…
Oct 13, 2026 • 4 min read
How Things Work
How Do Smoke Detectors Detect Fire?
Residential smoke alarms usually detect particles made by combustion rather than flames themselves. Photoelectric alarms shine light through a dark sensing chamber and trigger…
Oct 13, 2026 • 3 min read
How Things Work
How Do Automatic Doors Detect People?
Automatic doors commonly use microwave radar to detect motion approaching the entrance, active infrared sensors to measure reflections in a monitored zone, or both.…
Oct 13, 2026 • 3 min read
How Things Work
How Do Mechanical Pencils Work?
Most click mechanical pencils use a spring-loaded three-jaw clutch. Pressing the button pushes the clutch forward and opens its jaws, allowing the graphite core…
Oct 13, 2026 • 3 min read
How Things Work
How Do Induction Cooktops Work?
An induction cooktop sends alternating electric current through a coil beneath its glass surface. The coil creates a rapidly changing magnetic field, which induces…
Oct 11, 2026 • 3 min readWORTH KNOWING
Popular & evergreen
Digital Life
How Undersea Cables Carry the Global Internet
Hair-thin glass fibers inside armored ocean cables move most intercontinental data as pulses of light between landing stations.
Sep 18, 2026 • 5 min read
Future Technology
How Quantum Computers Detect and Correct Errors
Quantum information is fragile, yet researchers can detect mistakes without directly reading and destroying the state they want to protect.
Sep 14, 2026 • 8 min read
Digital Life
Why GPS Would Fail Without Einstein’s Relativity
Every GPS position depends on clocks orbiting Earth—and those clocks do not tick at the same rate as clocks on the ground.
Sep 14, 2026 • 8 min read
Robotics
How Robots Learn to Walk Without Step-by-Step Programming
Modern legged robots can practice millions of simulated attempts, optimize a control policy and transfer the result into machines that still have to survive…
Sep 14, 2026 • 4 min read