Read the latest articles from Popular Science (Page 746)

Is one dose of the COVID-19 vaccine enough?

A slow vaccine rollout means many may be left waiting for their second dose. How much does that matter?

Interacting galaxies seen among stars through a telescope

Behold six galactic collisions, masterfully captured by Hubble

The mergers can teach us about how stars are born.

By Jessica Boddy

A person in glasses and a buttoned shirt tossing a handful of colorful confetti in the air

A psychologist explains how hope can make a difference in impossible times

It’s more enduring than optimism, but you to have to dig a little deeper to find it.

By Jacqueline S. Mattis/The Conversation

a medical syringe

COVID vaccines are getting thrown out thanks to strict distribution rules

Here’s everything you need to know this week.

By Claire Maldarelli

cold ocean waters with chunks of ice

The polar vortex is about to split in two. But what does that actually mean?

This might spell a snowy January for the US. Or not.

By Philip Kiefer

Hand holding iPhone indoors against modern paintings.

Your phone’s home screen can hold more than just apps. Here’s what else you should add.

Break free from the grid.

When it comes to COVID-19 risk, what counts as ‘outdoor’ dining?

Ranking risk from inflatable igloos to chilly patios.

By Sara Kiley Watson

People dancing at house party at night

These apps bring the magic of a house party online

Meeting someone in the bathroom line can be a thing again.

By Sandra Gutierrez G.

Charging an electric vehicle.

Electric Vehicles

What to know before you buy an electric vehicle

This guide will help you understand the trickiest aspects of EV ownership: charging and range.

Stressed? Try screaming. Yes, really.

A primal scream won’t solve all your problems, but it’s a good first step.

By Sara Kiley Watson

Stock image of a crowd from an unspecified event.

Facial recognition still can’t prove someone’s identity

AI can provide clues, but facial recognition is still nowhere near reliable enough to count as legal evidence.

By Stan Horaczek

This image was taken by Voyager 2, and features its Great Dark Spot and a bright moving spot colloquially called Scooter.

Neptune’s bumpy childhood could reveal our solar system’s missing planets

The peace of the modern solar system hides a violent youth.

By Charlie Wood

A helicopter with a person on the hoist below it.

Stay calm under pressure with lessons learned in the world’s most stressful careers

You may not be a trauma surgeon, but you can use some of the same coping mechanisms.

A bookshelf made out of a reclaimed wood pallet, full of books, with a chalkboard panel.

Turn an old pallet into a handy—and free—bookshelf

This project is an easy way to add some personal flair to your home.

By Jose Mendoza

A US sailor at the Naval Medical Center in San Diego, California, prepares Pfizer COVID-19 vaccines for rollout

Vaccines conquered smallpox and polio, but COVID-19 looks like a tougher battle

For starters, the US has barely reached 25 percent of its vaccination target.

By Tyler Santora

An Apple macOS laptop, desktop computer, tablet, and iOS iPhone on a wooden desk.

How to keep people from stealing your Wi-Fi

Give digital trespassers the boot.

aid workers in Africa go door-to-door to deliver accurate information about Covid-19

COVID-19 could make malaria surge, but African aid workers are fighting back

Community efforts are stepping up as experts warn about an increase in malaria cases as the pandemic wears on.

By Ashley Stumvoll/Undark

An artist's impression of the James Webb Space Telescope, finally set to launch this year.

Mars missions, a super-powered telescope, and more exciting 2021 space events

Watch this space.

By Paola Rosa-Aquino

large forest tree

Behold the world’s tallest trees

A photographer-and-ecologist team are on a mission to document the mightiest members of forests.

By Sara Kiley Watson

Person sleeping peacefully in bed

Skip the wearables and track your sleep with these 5 apps

Cuddle up with your phone.

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