Read the latest articles from Popular Science (Page 406)

Trinity test color photo
Weapons

How the real Trinity test was filmed and photographed, and where to watch it

Christopher Nolan's film "Oppenheimer" cinematically depicts the first atomic test, but actual footage and photos from the event endure.

Group of friends laughing.
Psychology

Even ‘fake’ laughter has social value

For humans, a chuckle has expanded from its original function as a play signal to serve a variety of functions.

Bronze Age arrow made of meteoric iron
Archaeology

This archaic arrowhead might be made from iron that fell from space

Meteoric metals were used as nifty materials before smelting was commonplace.

A woodpecker uses a bird feeder. Interest in bird feeding surged in 115 countries during early COVD-19 lockdowns.
Birds

People around the world got really into feeding birds during the pandemic

Countries with higher species of bird diversity saw the biggest jump in searches for proper wild bird feeding.

Universal Hydrogen propellor plane taking off from runway
Aviation

Hydrogen-powered flight is closer to takeoff than ever

Once dismissed as impractical, hydrogen fuel cell planes are showing new promise after a series of successful test flights.

Two researchers look at green plasma ray in lab setting
Engineering

Plasma beams could one day cool overheating electronics in a flash

Researchers have developed a 'freeze ray' that relies on thermodynamic quirks to chill its targets.

An artist's rendition of the Perucetus colossus.
Evolution

This giant sea cow-like whale may have been the heaviest creature to ever live on Earth

Millions of years ago, the stubby-armed, 750,000-pound Perucetus colossus chilled out in the ocean shallows.

antique store furniture
Sustainability

Pro tips for buying high-quality used furniture—and keeping it looking new

'If you look after your furniture, your furniture will look after you.'

Why do people have recurring nightmares?
Psychology

Why do people have recurring nightmares?

Why do some people have the same bad dreams over and over, and how can they be stopped?

The YouTube mobile app on a phone, with a Peppa Pig video queued up to download or watch.
Tech Hacks

How to download YouTube videos to watch offline

Some places that claim to help you download YouTube videos may be sketchy, and there's only one official way.

Red kombucha tea in a bottle and glass on white background
Diabetes

Kombucha’s health benefits may go beyond our guts

The trial is a stepping stone to understanding if and how drinking kombucha helps with diabetes.

Porites rus corals and scuba diver
Ocean

Coral is reproducing in broad daylight

Scientific wisdom says corals reproduce at night. But on reefs around the Indo-Pacific, that might not be the case.

a john deere motor grader in a factory
Engineering

In photos: How John Deere builds its massive machines

Take a look at the fabrication process for vehicles like colossal dump trucks, motor graders, and wheel loaders.

Audio sound wave
AI

Deepfake audio already fools people nearly 25 percent of the time

The percentage of passable AI vocal clones may be even higher if you aren't expecting it.

Laptop screen showing ChatGPT homepage
AI

Researchers found a command that could ‘jailbreak’ chatbots like Bard and GPT

The attack relies on adding an “adversarial suffix” to your query.

Fluorescent dye shows the growth of teeth and bones.
Biology

Glowing dye lets us peek inside growing bones and teeth

For the first time, biologists have precisely tracked the development of hard biological structures.

The physical reconstruction of the necklace found in the Neolithic village of Ba’ja in Jordan. It has about 16 strands of beads that meet together in a circle with a gemstone in it and three other strands on top.
Archaeology

Ancient child’s grave holds intricate necklace with more than 2,000 stones

Even in the Neolithic era, people loved bling.

Lit incandescent light bulb laying on its side
Technology

The US ends incandescent lightbulb sales—with brighter days ahead

After more than a century in the spotlight, filament bulbs are a thing of the past (mostly).

a child exploring dinosaur bones
The Weirdest Thing I Learned This Week

Why kids make the best amateur fossil hunters

Plus other fun facts from The Weirdest Thing I Learned This Week.

A moth called a tobacco budworm on a green leaf. Moths like the tobacco budworm use pheromone signaling to find mates.
Insects

How male tobacco budworm moths found their perfect cologne

The pollinators use a specific blend of pheromones during courtship to increase mating success.