Skip to main content

Subscribe to Smithsonian magazine and get a FREE tote.

Engineering

Artist Elliot Walker created a sculpture using color-changing glass developed by University of Sheffield researcher Lisa Hollands.

New Research

Romans Made Color-Changing Glass With Ancient Nanotechnology. Scientists Just Discovered How to Replicate the 1,600-Year-Old Marvel

Researchers were inspired by Lycurgus Cup, a chalice from the fourth century C.E. that appears opaque green under reflected light but wine red when lit directly. “To me, it’s magic,” the lead researcher says

Dams block the flow of a river to hold water in a reservoir, which can be used for agriculture, recreation, household needs or industry. The flow of water through a dam can generate hydroelectric power. Aging dams are being dismantled across the country, restoring the natural flow to rivers.

Dam Removals Are Bringing Fish Back Across the Northeastern United States, Striking Down One Tiny Barrier at a Time

While the demolition of big dams in the West gets more attention, many of these often-obsolete obstructions are also coming out of northeastern streams and rivers—and herring are returning in droves

A Bubble Barrier creates a diagonal line of whiter water in Amsterdam's Westerdok.

Could This Dutch Invention Help Tackle Plastic Pollution in America’s Waterways?

The Netherlands has had success with the Bubble Barrier, which pumps air bubbles from the bottom of a canal or river to direct plastic to the surface. Now, Lansing, Michigan, is looking to be the first to install the technology stateside

Margaret Hamilton in the Apollo Command Module

Margaret Hamilton, a Pioneering Software Engineer Who Made the First Human Moon Landing Possible, Dies at 90

Hamilton popularized the term “software engineer” and created computer programs that could anticipate problems. She received a Presidential Medal of Freedom and was inducted into the National Aviation Hall of Fame

Researchers tested the battery in an RFID tag that can be rolled up in a capsule and swallowed. It can then transmit information about the digestive tract to a reader outside the body.

Scientists Invent a Digestible, Paper-Based Battery That Can Power Swallowed or Implanted Medical Devices

So far, the technology has been tested only in pigs. If it’s successful in humans, it could one day power tools that monitor your health or deliver drugs or electrical currents inside the body

The 2,500-year-old temple, photographed in 2009

New Research

Centuries Ago, an Architect Characterized the Parthenon’s Curves as a Clever Optical Illusion. Now, a Mathematician Begs to Differ

In the first century B.C.E., Vitruvius wrote that the Acropolis’ largest temple was horizontally bowed so that it didn’t seem to sag, and that explanation persisted for millennia. New research suggests a different reason

A side view of a "xenocortical" mouse brain, with the grafted human tissue seen in green and red.

Scientists Created Mice With Half-Human Brains. The Hybrid Animals Could Revolutionize Our Understanding of Neurological Disorders

Our brains and their associated diseases are notoriously hard to study. So researchers developed an animal model with a cortex—the brain’s outer layer—grown from human-derived cells

A staircase leads into the central chamber of the newly discovered Chimú tomb near Trujillo, Peru.

Unsealed for the First Time in 600 Years, This Tomb in Peru Was Just Declared the ‘Discovery of the Decade’

Archaeologists excavating Chan Chan, the capital of the pre-Inca Chimú civilization, found an undisturbed mausoleum that held the remains of at least 38 individuals, as well as a trove of rich funerary goods

Records uncovered by researcher Christopher Moore indicate that stones from Sandown Castle were repurposed in a Victorian-era extension of Constable's Gate at Dover Castle (pictured here).

Cool Finds

Stones From One of Henry VIII’s Fortresses Spent More Than a Century Hidden in Plain Sight. New Research Suggests the Victorians Repurposed Them as Building Materials

Recently discovered archival records indicate that workers constructing an extension of the Constable’s Gate at Dover Castle in the late 19th century reused fragments of the Tudor-era Sandown Castle

Scientists used Evo, an AI tool that can suggest genome designs, to design new viruses. 

Scientists Used A.I. to Design New Viruses. The Technology Could Be a Boon for Medicine, but Experts Worry About Harmful Pathogens

The findings represent the first genomes, or complete genetic instruction books, designed entirely with generative A.I. The resulting viruses attack only bacteria, which could one day help overcome the problem of antibiotic-resistant microbes

Streaks of light from Venus and satellites

An Aerospace Startup Just Got Approval to Test Beaming Sunlight to Earth. Here’s Why Experts Are Worried—and Petitioning

By 2035, Reflect Orbital aims to launch up to 50,000 satellites equipped with mirrors to provide sunlight to Earth-based solar panels. Critics are concerned about impacts on wildlife, astronomy research and human health

A blue whale has been gathering food deep within the water column and reaches the surface with its throat pleats still distended, forming an enormous pouch. Within a few moments the whale will right itself up, expell the water, swallow the food, take several breaths and dive again.

The Global Web of Subsea Cables That Connects the World Can Now Detect Whales—Even When They’re Silent

A diving whale revealed how existing technology makes it possible to monitor cetaceans swimming quietly across the seabed

An artistic conception of one of the Voyagers speeding through space

NASA Completes Daring ‘Big Bang’ Fix on the Voyager 2 Probe, Allowing It to Keep Studying Interstellar Space

Scientists swapped three of the probe’s heating devices for ones that use less energy, and they might do the same with Voyager 1. Both spacecraft launched almost 50 years ago

The glassy sphere of hiroshimaite created in the atomic blast that contained a previously unknown metal alloy. 

The Hiroshima Atomic Bombing Birthed a Strange, Never-Before-Seen Material, According to a New Study

The devastating blast vaporized buildings, metal, glass, soil and water. When the substances cooled and condensed, the process created spherical glassy grains—and some of them seem to contain a previously unknown metal alloy

The S.S. Great Britain was the world’s largest passenger ship upon its launch.

Once the World’s Biggest Passenger Ship, This Metal Marvel That Crossed the Atlantic and Took Immigrants to Australia Has a New Museum Home

A new museum dedicated to stories surrounding the S.S. “Great Britain” is about to open in Bristol, where the ship is permanently dry-docked

The Canopus, a pool at Hadrian's Villa in Tivoli, Italy

How Has Roman Concrete Lasted for Millennia? A 1,900-Year-Old Latrine Offers New Clues About the Material’s Impressive Durability

A chemical process called carbonation, which helps seal cracks, could help explain why many ancient Roman structures are still standing today. Researchers hope that the insights will lead to better modern-day building materials

Earth is currently experiencing an occurrence of the El Niño climate pattern.

Could We Mitigate Super El Niños by Artificially Changing the Climate? A New Study Indicates Yes

Researchers used computer models to see what would have happened had scientists caused marine cloud brightening in the face of strong past El Niños

One of the most unusual public transportation systems in the world, the train hangs from an elevated steel track.

When Germany Built a Flying Train 125 Years Ago, a City Coalesced Beneath It. It Has Moved Royalty, Commuters and Tourists—and One Elephant—Ever Since

When there was no room on the ground, towns in the Wupper Valley looked to the skies and built a suspension railway that became a source of pride and connection

A cyborg cockroach wearing a diving suit, which provides oxygen.

Cyborg Cockroaches Could Help Find Survivors of Natural Disasters. New Diving Suits Allow the Insects to Expand Their Search Underwater

Previously, researchers created electrical implants to control cockroaches’ movements for search-and-rescue missions. Now, they’ve made 3D-printed suits that provide oxygen, allowing the critters to survive submerged for up to three hours

To turn shrimp shells into a feedstock for hydrogen gas production, the process begins with mashing the shells into a rust-colored shrimp slurry.

How Shrimp Shells Are Being Turned Into ‘Carbon Negative’ Fuel, Food and Construction Materials

Engineers in Singapore have developed a new, multistep chemical process that transforms organic waste into useful, sustainable products

Page 1 of 26