Engineering is the discipline of design and construction of mechanical devices, equipment, structures and public works systems. Topics include aircraft technologies, buildings, bridges, robotics and heavy machinery.

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Moscow's St. Basil's Cathedral in 7 Different Architectural Styles

St. Basil's Cathedral in Moscow is an architectural oddball, but travel company RealRussia decided to imagine what it would look like in seven more conventional architectural styles.

Seiichi Miyake Created Tactile Paving System to Help Visually Impaired

The Japanese inventor's textured ground surface indicators to assist pedestrians at traffic crossings.

Thank Goodness for Retractable Cords, Right?

They keep our miles and miles of unruly cords untangled and out of the way. But how do they work?

'AntBot' Uses Celestial Navigation Instead of GPS

A new robot ant uses the same technology desert ants use to safely, efficiently navigate through the searing Saharan sun.

What's Really Going on at the 'Tesla Tower'?

There's a mysterious tower in Texas that strongly resembles Nikola Tesla's Wardenclyffe Tower. Its constructors say they're testing some new forms of electromagnetic waves. But is something else going on?

Creaking Floors Served as Security Warning System in Ancient Japan

In 17th century Japan, wealthy citizens built homes with "nightingale floors" that squeaked, warning them of intruders. In fact, the floors squeaked louder when the steps got lighter.

Algorithms Not So Great at Identifying Adult Content

We humans may 'know it when we see it,' but the bots sure don't. At least not yet.

Egyptian Pyramids Built with Ramps, Not Alien Technology

We may finally know how the ancient Egyptians built the pyramids.

Soccer, Shopping, Dining: Mass Transit Stations Aren't Just for Travel Anymore

These days, you can do a lot more at a transit hub than simply catch a train or a bus.

Could We Build Our Own Gundams?

Well, heck yeah, we can, and we have. Let's take a look.

Meet the World's Longest Sea-Crossing Bridge

The Hong Kong-Zhuhai-Macao Bridge is 34 miles (55 kilometers) long and connects the territories of Hong Kong and Macao to mainland China for the first time.

50 Years After '2001: A Space Odyssey,' How Close Are We to HAL 9000?

Stanley Kubrick's sci-fi masterpiece '2001: A Space Odyssey' premiered 50 years ago, and it got a lot of things right. But what about HAL? How close are we to those kinds of capabilities?

Printing With Sound: The Wave of the Future

Researchers at Harvard University have developed a method of printing objects using the pressure of sound waves on even the most viscous liquids.

Recycled Plastic Waste Creates Roads

Plastic road materials-maker MacRebur is paving the way to a greener environment, using recycled waste to build roads.

Smart Wallpaper Contains Fire Alarm

Researchers in China have developed a non-toxic "smart" wallpaper that won't burn and triggers an alarm when it gets hot.

Chinese Robotic Sub Looks Like a Clown Fish

China's newest unmanned submersible isn't designed to be cute — it can go deeper underwater, stay under longer and maneuver more deftly than its predecessors.

The First 'Killer Robot' Was Around Back in 1979

With the Campaign to Stop Killer Robots heating up, we step back a few decades to look at the first human death by robot.

Installation Begins on the 10,000 Year Clock

A massive solar-powered clock being constructed inside a mountain in Texas is designed to keep time for 10,000 years.

Tons of Mardi Gras Beads Clog NOLA's Storm Drains

City workers have pulled 46 tons of the colorful beads from New Orleans' clogged catch basins, mostly from a five-block stretch along St. Charles Avenue.

How Removing Public Monuments Works

Controversy surrounds the removal of public monuments honoring the U.S. Confederacy. But who or what determines which monuments go up or come down?

Bollards, or How Cities Are Protecting Their Public Spaces From Terrorism

Defensive design is becoming increasingly important in cities around the world.

How Cosmic Rays Revealed a Secret Void in the Great Pyramid

Cosmic rays sound like something out of sci-fi, but they're helping scientists unlock the secrets of one of the oldest human-made structures in the world.

Why Aren't Modern Suburbs Built on a Walkable Grid?

You might be surprised to learn that the twists and turns of streets in the suburbs date all the way to the Industrial Revolution.

Researchers Create Odor Wheel That Breaks Down the Smell of Old Books

Old books smell a lot like chocolate and coffee, thanks to certain chemical compounds.