These Are Our Favorite Hair Straighteners

Curls and waves are beautiful. But when you want to smooth them out, these hot tools (including irons, a brush, and a comb) work wonders.

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Mathematicians Settle the Erdős Coloring Conjecture

Fifty years ago, three mathematicians came up with a graph theory problem that they thought they might solve on the spot. A team has finally settled it.

14h

Ecobee’s Ecosystem Is an Easy Way to Embrace the Smart Home

For the past six months, this Alexa-integrated security and thermostat platform made my house feel safer and more comfortable.

14h

The Pandemic Proved That Our Toilets Are Crap

The core technologies for sewage systems were developed over a hundred years ago. It's time to get better, healthier updates in the pipeline.

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How to Schedule Emails and Texts to Send Anytime You Want

Your messages don’t have to go out right away. Be strategic about when your recipient gets them.

15h

How the Smart Remote Lost Its Way

Once, we dreamed of one controller to rule them all. But when Logitech killed off the Harmony line, it ended an era.

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The Best Accessories for Your New PlayStation 5

From backup controllers to full-on sound systems, here are our favorite complements to your PS5.

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How the FBI Got Into the San Bernardino Shooter’s iPhone

Plus: Russian sanctions, Europe’s SolarWinds fallout, and more of this week’s top security news.

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Everyone On Facebook’s Oversight Board Should Resign

The committee's coming decision on banning Donald Trump from the platform is meaningless. Its existence only gets in the way of actually fixing Facebook.

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What Is Hi-Fi Audio, and Should You Pay More for It?

A number of streaming services offer "high-quality" options, from Amazon Music to Spotify's upcoming tier. Here's how to demystify them.

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