Read the latest articles from Popular Science (Page 684)

sperm whales seen from above
Whales

Sperm whales have a surprisingly deep—and useful—culture

Whalers and researchers alike have found that these mammals are excellent at learning from each other.

salmon healthy food
Heart Disease

5 heart-healthy foods—and 2 to absolutely avoid

If it feels hard to keep up with nutritional advice, don’t worry—cardiologists are here to help.

covid-19 vaccine
Vaccines

Native American communities take the lead on vaccinations after facing staggering rates of COVID-19

The pandemic’s impacts will be felt for generations.

A woman in a red bathing suit sitting on the floor by a sliding glass door, staring at the ocean outside.
Projects

How to fix a sliding door without taking it down

Try these repairs before embarking upon an involved project.

sea lion chasing a school of fish
Ocean

Protecting 30 percent of the oceans would benefit the entire planet

If we protect the right places, we can benefit fish and the climate—without sacrificing seafood

newborn baby with its parent
Vaccines

We now know babies can be born with COVID-19 antibodies

Here’s what pregnant and new parents need to know.

The NASA STS-39 shuttle crew in orange astronaut suits on a space backdrop
Air Force

What did ’90s NASA astronauts pack for space?

There’s no punchline, unless you count the homemade jelly.

Vaccine shot vials on pink background.
Vaccines

Vaccines may help alleviate symptoms for people with long-COVID

Here’s everything you need to know.

A woman sitting behind a laptop, looking somewhat amused.
Tech Hacks

This free tool can reveal who is behind any internet domain

Understanding a WhoIs search is a useful skill to add to your repertoire.

Stacks of logs against skyline.
Climate Change

Burning wood pellets won’t help us fight climate change

‘Renewable’ isn’t the only point to consider.

doctor putting bandaid on arm after person gets a vaccine
Vaccines

COVID vaccine hesitancy is showing up in unexpected places

Though BIPOC are often highlighted, they’re not the group with the highest rates of vaccine hesitancy.

A helicopter named Elvis parked on the tarmac.
Drones

Elvis (the helicopter) is cheating death by becoming a drone

The S-64 Air Crane is a former firefighting helicopter that’s being converted for autonomous operations.

a sign made of tape that points to free stuff
Tech Hacks

Where to find the best free stuff online

Find everything from furniture to movies without dropping a penny.

Greenland's ice sheet
Army

How a top-secret nuclear project became a gold mine for data on Greenland’s ice sheet

‘Project Iceworm’ was a Cold War-era army project, and its results accidentally revealed secrets about our planet’s past.

Mug of green beer being poured
Health

Your liver does more than you give it credit for

Here are four reasons to celebrate the body’s largest internal organ.

A screen attached to a Roku, displaying various streaming apps.
Tech Hacks

7 tips and tricks to master your Roku

From PIN protection to instant replay when you miss a line of dialogue.

a man and a woman lay sleeping in bed
The Weirdest Thing I Learned This Week

You get brainwashed whenever you go to sleep (and that’s a good thing)

Your noggin is like a soapy loofah—and other fun facts from The Weirdest Thing I Learned This Week.

Woman applying lotion in mirror
Health

Are ‘clean’ cosmetics better for us than other beauty products?

A new chapter in the hunt for truly non-toxic, ethical cosmetic ingredients.

A person holding an iPhone while sitting in front of a laptop, possibly setting up a burner phone number.
Tech Hacks

You should get a burner phone number (even if you are not a spy)

No, you don’t need to buy a new phone.

Tourist in surgical mask in front of the Eiffel Tower
Vaccines

COVID-19 ‘vaccine passports’ could set a troubling precedent

It’s a matter of privacy and privilege.