William Gurstelle
at 08:00 AM Aug 8 2017
Make // 

Humans have been building watchtowers since long before we had the written language to describe them. In the ancient city of Jericho, archeologists found the ruins of a conical 30-foot-tall building that dates back to 8000 BCE. In northeastern Scotland, 2,000-year-old tower-like structures called broches dot the countryside.

Sara Chodosh
at 09:17 AM May 30 2017
Hacks // 

You always forget to chill the booze. Somehow the burgers get prepped and the decorations get hung, but fifteen minutes before the cookout begins, you're stuck with lukewarm beer.

Marissa Shieh
at 09:48 AM May 29 2017
Hacks // 

Sound the alarms: Water doesn't always freeze when it should. In fact, you can chill water and most other liquids below the temperatures at which they usually freeze. Scientists once cooled water down to the frigid temperature of -51°C, and the H2O remained liquid, at least for a fraction of a second, before it flash-froze. But forget scientists—you can use this phenomenon, called supercooling or undercooling, to make instant slushies—even beer slushies.

Sarah Fecht
at 10:50 AM Apr 28 2017
Make // 

If you think building a house on Earth is hard, try building one on Mars. Every pound of material that we ship to the red planet will cost thousands of dollars, so scientists want to construct our future martian colonies out of locally sourced materials—namely, martian dirt. But that's more difficult than it sounds.

Sophie Bushwick and Billy Cadden
at 12:22 PM Apr 13 2017
Hacks // 

For most of us, a dishwasher is a magical machine that transforms sauce-crusted plates into clean ones. But if you only use it for tableware, you're wasting this fantastic device. After all, a surprisingly wide range of items can safely sit through a cycle.

Kendra Pierre-Louis
at 11:22 AM Apr 7 2017
Hacks // 

A new study released earlier this week in the journal Nature Nanotechnology may be a major step towards making desalinated water—water in which salt is removed to make it safe for drinking—a viable option for more of the world. Researchers from the University of Manchester modified graphene oxide membranes, a type of selectively permeable membrane that allows some molecules to pass while keeping others behind, to let water through while trapping salt ions. It's essentially a molecular sieve.

Stack Commerce
at 12:07 PM Mar 22 2017
Hacks // 

In 2016, hacked security cameras and PVRs took down the web in the US. One major international bank lost $81 million to cyber criminals. In this climate, skilled hero hackers get paid handsomely to help companies find their weaknesses and stop malicious hackers in their tracks. The Ethical Hacking A to Z Bundle helps you build a lucrative security career with 45 hours of premium instruction, now just $39 at the Popular Science Shop.

 
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