Physics

Chemistry

Scientists Say: Experiment

An experiment is a set of procedures to learn about the world — and an important part of the scientific process.

Animals

Here’s why ducklings swim in a row behind mom

Baby ducks save energy by surfing their mother’s waves, but only if they do it in an orderly line.

Physics

Future cars may offer personal sound zones — no earphones needed

Zones that offer each passenger personal listening are closer to reality. A new design improves performance by adapting to the conditions in your car.

Materials Science

Analyze This: Hardened wood can make sharp steak knives

Researchers treated wood to make it hard and dense. Out of it, they carved sharp knives and nails that could substitute for ones made of steel.

Materials Science

These colorful butterflies were printed with transparent ink

Clear ink creates a whole rainbow of colors when printed in precise, microscopic patterns. This phenomenon is known as structural color.

Earth

Scientists Say: Convection

Convection is a process that transfers heat through the movement of liquid or gas.

Animals

Bacteria make ‘spider silk’ that’s stronger than steel

Part spider silk, the material is better than what some spiders make. Researchers think it might make the basis for surgical threads or unusually strong fabrics.

Earth

Here’s how ice needles can sculpt natural rock art

Striking stone patterns adorn remote cold landscapes the world over. The recipe for these adornments: Freeze, thaw, repeat.

Chemistry

Scientists Say: Electron

Electrons are negatively charged particles. They are attracted to the positively charged particles in the center, or nucleus, of an atom.

Animals

A spider’s feet hold a hairy, sticky secret

Their widespread stickiness traces to the shape of hairs on its feet, scientists now find.

Earth

Explainer: How auroras light up the sky

The northern and southern lights are considered natural wonders of the world. Here’s how these and related splendid sky glows form.

Brain

A sense of touch could upgrade virtual reality, prosthetics and more

Scientists and engineers are trying to add touch to online shopping, virtual doctor appointments and artificial limbs.