Here's how the seven types of plastics fare in the recycling process

A step-by-step guide to the plastic recycling process

Everything you wanted to know about how plastic is recycled, the companies that collect and recycle plastic, where you can recycle, and much more.

A guide to avoiding single-use plastics

Here’s everything you need to know about the most ubiquitous (and avoidable) kind of plastic waste: single-use plastics, the kind made to be tossed in mere minutes

What percentage of the world’s plastic waste actually gets recycled?

Despite growing awareness of the world’s plastic waste challenges, the numbers showing how much of the world’s plastic waste actually gets recycled are abysmal. Only 9% of the world’s plastic waste is properly recycled, and a significant portion remains landfilled, mismanaged, or incinerated. Read this article for further analysis of why this is and what can be done in the future to better manage plastic waste.

The history of natural and synthetic plastics

From cheap toys to woolly jumpers, plastic can be found in more products than many people realize. From a chemist's perspective all these things are made of the same class of materials: Polymers. And the distinction between which ones we happen to call "plastics" and which ones we don't is fairly arbitrary.

How plastic manufacturing could be sustainable again

From polymers to nurdles, learn how plastic is created and what we can do to slow the lasting repercussions this material will have on both our planet and our lives.

Where the US’s plastic recycling is discarded

The US ships over a million tons of plastic waste overseas each year. A short video explainer from USA Today shows a breakdown of what really happens to America's recyclables.

The plastics industry spent decades promoting recycling while privately doubting it would ever work

This FRONTLINE investigation reveals that plastic makers publicly championed recycling for years despite internal doubts about its viability, and that no more than 10% of the plastic ever produced has been recycled.

Watch how plastic products are molded from pellets that began as crude oil

Polyethylene and other plastics are formed by combining ethylene and propylene, which are produced through refining crude oil. These plastics are broken down into pellets called nurdles, or mermaid tears, which are melted and molded to manufacture countless products.

The global plastic crisis in images

For decades we have relied on plastics to keep us safe, insulate our homes, and make sure our food stays fresh. But when does plastic’s life come to an end?

Most biodegradable plastics don’t break down in everyday conditions

Despite their eco-friendly name, biodegradable plastics often require industrial composting, which most areas lack, to decompose the uncommon compounds found in them. This means they may linger in landfills or contaminate conventional plastics in recycling bins.

How chemical recycling could create 'infinite' plastic

The way we normally recycle plastics is a downward spiral of waste and degraded materials, but there is another option—turning plastic back into the oil it was made from.

The amount of plastic chemicals in 300 everyday Bay Area foods

Food production is more complicated than it appears, and manufacturing, packaging, and shipping processes can add significant substances to your food. This massive project compiled data on 300 samples of foods delivered to the San Francisco area, testing for the presence of 18 different kind of plastic. Learn how to read the data here with its helpful guides and then explore the table yourself.

Learn how humans can protect coral reefs

When diving and snorkeling in environments containing reefs, avoid touching reefs, anchoring on them, or using sunscreen with active ingredients harmful to marine life. Properly recycling and disposing of trash in bins helps reduce microplastics and chemicals that can run off into wastewater and into the oceans.

Alternative investments can be sorted into seven major categories, according to some experts

These categories include real estate, private equity, private debt, hedge funds, collectibles, and more.

How to safely dispose of every kind of battery

As lithium-ion batteries have proliferated in phones, e-bikes, power tools, and dozens of other devices, improper disposal has become a leading cause of fires in recycling facilities and garbage trucks. Battery Safety Now partnered with the US Forest Service's Woodsy Owl campaign to provide guidance on how to recycle batteries by type, including locator tools for drop-off sites.

Additive manufacturing consists of seven different process categories

Although 3D printing has become synonymous with the term, objects can be fabricated without filaments of hot plastic or light-sensitive powders. For example, during sheet lamination, ultrasonic waves—high-frequency vibrations—can join metal sheets by creating molecular bonds through friction.

The seven major US freight rail companies

The US railroad industry is dominated by seven long-running freight conglomerates. Get the basics on each of these companies with this brief overview.

Breaking down the different types of vaccine technologies

There are several different types of vaccines. Each type is designed to teach your immune system how to fight off germs—and the serious diseases they cause. This short overview breaks down the differences between the types.

Researchers generally group gut bacteria into six different categories

The trillions of bacteria in the gut microbiome can be grouped into six categories: firmicutes, actinomycetota, pseudomonadota, fusobacteriota, bacteroides, and a broad miscellaneous category. The functions of each are complex but range from breaking down food and producing vitamins to fighting pathogens.

Understanding the distinctions between coffee types

If you’ve ever felt overwhelmed looking at a coffee shop menu, you're not alone. Here's a breakdown between common coffee styles. Click through the link to see similar guides to espresso and cold drinks.

Renewable energy basics

Discover the many benefits to using renewable energy resources, but what is it exactly? From solar to wind, it’s the fastest-growing source of energy in the world – and how we can use it to combat climate change.

Breaking down the different types of drinking water, from alkaline to sparkling

While tap water is regulated by the EPA, environmental and infrastructural factors can introduce contaminants, which filtering can help to remove. Distilled water has had all of its mineral contaminants removed and may be used in laboratory settings, but mineral water has them added in for taste or to promote health.

Political typology quiz

Where do you fit in the political typology? Take this quiz to find out which political typology best matches your views. Sixteen questions serve to filter political views across nine typology groups. These groups include: Progressive Left;...

What's the difference between an ocean, sea, and saltwater lake?

What are the seven seas, the five oceans, and why isn't the Dead Sea considered a sea? This overview provides definitions for each.

Induced pluripotent stem cells are "reprogrammed" cells

Induced pluripotent stem cells are used in a great deal of stem cell research, but many people are still unfamiliar with exactly what “iPS” cells are. This video provides a clear (and short) explanation of iPS cells for non-experts, and offers insights into why scientists are interested in these cells.

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.

See how fireworks are made and learn how metals like magnesium and copper are responsible for different colors.

The first steps to rebuilding your credit score include getting to know exactly what's on your credit report and figuring out how far you are from the '700 club,' or 'good score' range.

The Nasdaq's 'Magnificent 7' companies are responsible for roughly 40% of the Nasdaq 100 index's gains, while the remaining 93 companies account for the other 60%.

Scientists can determine Earth's past climate conditions by analyzing air trapped in microscopic bubbles within ice cores—columns of compressed snow layers that build up over hundreds of thousands of years.

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

Visualize how CRISPR-Cas9—a type of immune system used by single-celled organisms to attack invasive viruses—targets and makes precise changes to a gene's DNA.

Read a deep dive on the 'all-purpose healing' peptide BPC-157.

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

Explore fun facts from the USPS, including unique post office buildings, a stamp that traveled past Pluto, and more.

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

This poison ivy knowledge quiz—accompanied by photos of the plant's varied forms—may help you identify this common rash-inducing growth.

Calculate how much of your tax dollars go to each federal program based on your income, filing status, and number of children

Doctors differentiate between a phobia and fear by asking patients whether their fear interferes with their day-to-day activities.

Watch this video that uses Lego bricks to explain how venture capital works.

See how each of the more than two million known species relates to each other—and to common ancestors—in this zoomable tree of life.

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.

When you complete a CAPTCHA on a website to prove you are human, you may be unknowingly training algorithms for self-driving cars, whose systems require training data to help identify crosswalks, bicycles, and other outdoor objects.

Planarian flatworms are small, aquatic worms with exceptional regenerative capabilities. When cut, the worms can regenerate multiple bodies in a matter of weeks.

SpongeBob exemplifies Aristotle's philosophy for living well because he understands that happiness doesn't come from external factors like money, recognition, or power.

A century of Billboard issues documenting the evolution of popular music.

Some renewable energy sources may weaken the resiliency of electric grids by removing outage buffers provided by coal- and natural gas-fired plants, which provide the system with more time to find a new power source if a plant goes down.

Gerrymandering works through two techniques: cracking opposing voters across districts to dilute their power, and packing them into a few to waste their votes in lopsided majorities.

The hormonal disorder PCOS was renamed PMOS in 2026, a move designed to improve care and research by shifting the focus to the hormonal causes of this condition that affects 1 in 8 women.

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