Watch Apple Watch cases be 3D printed from titanium powder

The benefits of 3D printing batteries, from safety to sustainability

Rather than using the liquid electrolyte commonly found in lithium-ion batteries, 3D-printed batteries would use a solid layer, which can be custom-built into different shapes, deliver higher energy density by building thinner layers, and be fabricated with fewer raw materials compared to injection molding.

Most custom earmolds for in-ear hearing aids are made using 3D printing

The technology has also been utilized for behind-the-ear and receiver-in-canal hearing aids, allowing for the creation of structures tailored to the patient's anatomy for enhanced effectiveness. 3D printing has also been used to print retinal eye cells and custom eyeglass frames.

The centuries-old history of titanium white goes back to the Inca

Titanium white can be found in items ranging from paint to pills. Though it was created in New York in 1908, the pigment was first used hundreds of years earlier by the Inca, according to this article.

Objects can be 3D printed with light by projecting 2D computerized tomography (CT) scans onto rotating cylinders of resin, which solidify upon exposure.

Objects can be 3D printed with light by projecting 2D computerized tomography (CT) scans onto rotating cylinders of resin, which solidify upon exposure.

View a gallery of 3D printed clothing

Many 3D printed garments represent wearable art where technology meets couture. Despite their appearances on runways since Iris van Herpen's pioneering top at Amsterdam Fashion Week in 2010, mainstream adoption has been limited due to high costs and reduced comfort when compared to fabric-based apparel.

Massive 3D printers have been used to build homes by stacking layers of 'concrete toothpaste,' a fire-resistant material that effectively insulates against outside noise.

Thingiverse is a massive free library of 3D-printable designs

The site—which was launched in 2008 by 3D-printer manufacturer MakerBot—hosts more than 2 million user-generated design files to build everything from prosthetic hands to replacement dishwasher parts (or the "Golden Snitch" from "Harry Potter). The community behind it rapidly designed and shared files for face shields and ventilator components amid the COVID-19 pandemic.

Multi-material 3D printing produces filament waste if only one nozzle is used

When swapping between colors or materials in a fused deposition modeling system, a considerable amount of filament is purged from the nozzle before introducing a new filament. Filament extruders can create new filament from purged elements, but the device combines colors and produces filaments of inconsistent diameter.

Watch a time-lapse of 3D printing a Groot figurine

The total printing time on the Prusa i3 MK2 printer was 12 hours and 32 minutes, with the head alone taking nearly 5 hours to print from layering plastic filament.

Using AI to track plastic pollution in real time

Explore Global Plastic Watch, the first-ever, near-real-time, high-resolution map of plastic pollution. Global Plastic Watch uses advanced satellite data technology and machine learning to measure piles of plastic waste from space.

Tesla plans to eliminate the use of rare earth elements in future vehicles

At a 2023 Investor Day event, Elon Musk outlined steps to focus Tesla's efforts on climate action rather than new vehicle models. Musk estimates the transition to carbon-free, sustainable energy will cost $10T.

Artificial coral reefs have been 3D printed from nontoxic, biodegradable terracotta clay, which coral polyps have used as a foundation for rebuilding marine ecosystems.

Tim Cook refused to give the FBI a backdoor into iPhones during a terrorism case

The Apple CEO's refusal to comply with the government's request was viewed as controversial, despite support from privacy advocates. The FBI would later back down, claiming to have gained access to the device without disclosing additional details.

Turning nuclear waste into cancer medications

This video explores Terrapower, a company transforming nuclear waste into lifesaving cancer treatments. This is accomplished through the production and use of Actinium 225, a rare isotope derived from thorium, which is used in targeted alpha therapy to treat cancer.

A new scan of the Titanic reveals details about its final hours

Using over 700,000 images captured by underwater robots, researchers created a highly detailed 3D "digital twin" of the Titanic. The analysis gives us new insights into the life of the ship that lays 3,800m down in the icy waters of the Atlantic. Emerging details from close-up images, such as a smashed porthole likely caused by the iceberg, match the eye-witness accounts of what happened. Read for more insights into the devastating wreck.

Fiberglass and epoxy resin on blades complicate the recycling of wind turbines

Between 85 and 95% of a turbine's materials—except for the blades—can be recycled. Blades have been left in landfills when not repurposed into playgrounds and sheds, but new processes may allow them to be made into pellets for injection plastics and concrete.

Microchip fabricators create light by heating tin droplets to over 220,000 Kelvin

Every second, lasers strike 50,000 droplets moving at 250 kilometers (155 miles) per hour, vaporizing the tin in supernova-like miniature explosions that produce ultraviolet light. Knowing this light will spread via diffraction as it passes through a filter during manufacturing, designers reverse-engineer the filter design based on the required final microchip pattern.

The first smartwatch was made by Microsoft in 1994

Coproduced by Timex, the Timex DataLink 150 featured a small LCD screen and could transfer data to and from a Windows PC. Like the Windows XP Tablet that launched in 2002, the smartwatch did not sell well, and both products are considered to have been released before their time.

Harvard and MIT researchers are developing life-saving tattoos

Tattoos aren’t just a fashion statement. Scientists are trying to find life-saving applications for them. Harvard and MIT researchers are developing tattoo inks that react to body chemicals, alerting diabetics to blood sugar fluctuations or athletes to dehydration. Someday, patients may observe their body chemistry with tattoos that change colors.

Critics choose the 2025 ‘Worst in Show’ awards for CES products

Under the motto “Not all innovation is good innovation,” The Repair Association has selected products at CES that are the least private, sustainable, or repairable for consumers—as well as the “Who asked for this?” award. For example, the least repairable award went to the $2,200 Ultrahuman Rare Luxury Smart ring, which can only be charged 500 times—and replacing the battery effectively destroys it.

Making the Oscar statuette is a thorough and involved process

From casting the molten metal into its iconic shape, to the electroplating process that gives Oscar his signature 24-carat golden glow, to assembling the finished product and engraving the winner's name, there's much more to this knight than meets the eye.

The Times Square New Year's ball has been redesigned 8 times

The first iteration was made of iron and wood, weighing in at 700 pounds. The 2025 version is made of 5,280 crystals and 32,256 LED lights and weighs a whopping 12,350 pounds.

As of 2024, about 77% of the world's gold reserves have been mined

About 216 million metric tons—about 0.4% of the Great Pyramid of Giza's volume—have been extracted and used primarily for jewelry. The remaining reserves are estimated based on chemical analysis of rock samples extrapolated to the entire mass of Earth's crust.

Why atoms are used to keep track of time and define the meaning of a second

Small variations in the production of human-made devices, such as mechanical watches and pendulums, make them unreliable for the ultraprecise timekeeping required by modern technology, including financial transaction timestamping and GPS. Because atoms obey fundamental laws of nature and never wear out, their light emissions when energized provide a consistent timekeeping signal.

Why new Rolexes can cost less than used ones

It's reasonable to assume a new Rolex watch—which often sell for thousands of dollars each—would be more expensive than a used version. However, that's increasingly not always the case. This video explains why some used Rolexes cost more than their new counterparts. Watch it here.

Particles found in Martian air pose significant risks to human lungs

Ultrafine dust, just 3 micrometers wide, is small enough to bypass lung defenses and enter the bloodstream, where its highly reactive chemicals can cause thyroid disease. Silica in the dust can also cause silicosis, a chronic and incurable lung disease.

Bill Bowerman’s daughter-in-law found the waffle iron he used to create a breakthrough shoe

Nike cofounder and University of Oregon track coach Bill Bowerman poured polyurethane into a waffle iron for his first attempt at creating the revolutionary waffle-knit sole. The waffle iron, which was found in his backyard, now sits in Nike’s headquarters.

Tattoos remain visible on your skin thanks to immune cells called macrophages

Sony set the standard for cylinder-shaped batteries when it repurposed manufacturing equipment used to make rolls of magnetic recording tape.

As of 2025, the most cited papers in science include a review of graphene, methods to improve image recognition, streamlining electron density calculations, and optimizing protein studies.

While atoms are normally made of protons, neutrons, and electrons, exotic ones have been built with antimatter—alternate versions of normal matter that live for fractions of a second and are about a billion times as rare.

In 2025, four executives from large tech companies were given positions in the US Army Reserves—including Palantir Chief Technology Officer Shyam Sankar, which reinforced Palantir's ties with the US military and its role as a leading defense partner.

An investigation suggests a Scottish island became awash in forever chemicals via seafoam and seaspray—raising questions about what that means for the safety of other coastal areas.

About 2,000 US babies are born annually without some portion of their limbs, potentially leading to a lifetime of pricey prosthetics.

Learn more about the history of fireworks, which dates back to an accidental invention during an alchemist's quest for information about immortality.

SpaceX's S-1 or 'prospectus' revealed many previously unknown details about the company, including its unprofitability despite doing $18.7B in revenue in 2025, exactly how many voting shares Elon Musk will have in the company (roughly 85%), and more.

Apollo astronauts left items in the moon's 'toss zone,' including golf balls, family photos, and bags of human waste, to make room for lunar rocks.

In 2019, a laptop loaded with six of the worst malware in history and described as 'an exhibit of historical weaponry' sold for $1.3M.

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'

To reduce wrinkles in clothing, research recommends gentle wash cycles with more water and tumble drying with smaller loads and longer times.

For centuries, Niagara Falls has been a magnet for daredevils seeking to conquer one of nature's most powerful wonders, with its 200-foot drop and water rushing at 32 feet per second with 280 tons of force.

Children are now three times more likely to say they want to be a YouTuber when they grow up than an astronaut, with some even attending 'YouTube camps' that teach kids how to create content for the platform.

The most expensive ad of all time was for Chanel No. 5 perfume and cost roughly $33M to produce in 2004—about $57M in today's dollars.

Take a 3D tour of the Hajj, Islam's annual pilgrimage to Mecca, undertaken by more than 1.5 million Muslims each year.

Visualize the path of every solar eclipse from 1900 to 2099 and see what each looks like when observed from different locations on Earth.

NBA superstar Victor Wembanyama spent the 2025 summer training with monks in central China to enhance his body and mind.

The animatronic shark from Steven Spielberg's 'Jaws,' the first modern blockbuster, was a complex underwater apparatus called 'Bruce.'

Budweiser stores yeast derived from the original 1800s strain in a secret bunker, which only the Head of Yeast Management can access—not even the CEO

Power lines are dotted with large, brightly colored balls to improve the visibility of these thin wires to helicopters and small planes and help prevent potential crashes.