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When Coal First Arrived, Americans Said ‘No Thanks’

Back in the 19th century, coal was the nation’s newfangled fuel source—and it faced the same resistance as wind and solar today

One reader wonders: Since purple dye was scarce, why didn’t people just combine blue and red?

Why Was Purple the Color of Royalty? And More Questions From Our Readers

You’ve got questions. We’ve got experts.

An 1897 painting by Charles R. Knight depicting two dinosaurs called “Laelaps” in an energetic fight, suggesting they may have been warm-blooded.

Paleontologists Are Still Puzzling Over Why Dinosaurs Ran Hot

New evidence reveals details about the physiology of animals that have been extinct for over 66 million years

Researchers at Northwestern University created an implantable device that attaches to a nerve to deliver pain relief.

Innovation for Good

This Dissolvable Implant Could Revolutionize Pain Management

After some success on rats, researchers are hopeful this device could provide humans a more targeted and less addictive alternative to opioids

In their dissent, the court's three liberal judges wrote that their fellow justices had stripped the EPA of “the power to respond to the most pressing environmental challenge of our time.”

History of Now

How the Clean Air Act Came to Be

A new Supreme Court ruling curbs the EPA’s ability to regulate carbon pollution under the 1970 legislation

The yellow fever mosquito, Aedes aegypti, spreads dengue fever, Zika, chikungunya and other viruses that infect humans.

Dengue Fever and Zika Virus Make Humans More Attractive to Mosquitoes

Scientists conducted human and mouse studies to find the skin bacteria responsible for the draw

More than 10,000 mental health apps are available, according to one estimate. In order to pick the most reliable ones, researchers say you should consider their privacy policies, effectiveness, and costs.

The Future of Mental Health

Can a Mental Health App Help You Deal With Anxiety?

Experts say the aids can be a first step to meaningful treatment if you choose an app based on three criteria

Glowing green waters surrounded a boat in the Arabian Sea.

What Causes Swaths of the Ocean to Glow a Magnificent Milky Green?

A sailor who witnessed the rare phenomenon in person and a scientist who saw it from the sky team up to learn about the ghostly light

A skeleton of the giant Triassic ichthyosaur Shonisaurus popularis hangs in the Nevada State Museum.

Whale-Sized Marine Reptiles Once Ruled the Seas

Paleontologists are beginning to learn how and why ichthyosaurs evolved into giants

As of June 15, the World Health Organization had recorded a total of 2,103 confirmed monkeypox cases in 42 countries. Pictured: a colorized transmission electron micrograph of monkeypox virus particles (green) cultivated and purified from cell culture

History of Now

What You Need to Know About the History of Monkeypox

Mired in misconception, the poxvirus is endemic in certain African countries but was rarely reported in Europe and the U.S. until recently

Royal kombu (aka sugar kelp) harvested from the Netherlands’ first organic seaweed farm enriches and flavors the Dutch Weed Burger’s soy-chip-based patty.

Innovation for Good

Is Seaweed the Next Big Alternative to Meat?

From kelp burgers to bacon of the sea, sustainable food entrepreneurs are innovating to charm hungry omnivores

The Earth’s oceans have risen and fallen over the millennia. But they have, on average, been relatively stable over billions of years. The balance of the deep water cycle—the exchange of water between the Earth’s surface and its interior—has an important role to play in maintaining that stability.

How the Earth’s Mantle Sends Water Up Toward the Surface

A new model suggests “mantle rain” ensures we will always have a surface ocean

Participants in First Nature Tours help mitigate damages from wildfires in Central Oregon.

Regenerative Tourism Invites Travelers to Get Their Hands Dirty

Vacations that allow tourists to participate in conservation activities, such as habitat restoration, are growing in popularity

Aerial view of flooding in Livingston, Montana—a gateway town near Yellowstone National Park—on June 14, 2022

History of Now

What Extreme Flooding in Yellowstone Means for the National Park’s Gateway Towns

These communities rely almost entirely on tourism for their existence—yet too much tourism, not to mention climate change, can destroy them

Exotic animals including parrots and monkeys served as pets and entertainment in California in the 1850s.

The Monkeys and Parrots Caught Up in the California Gold Rush

Researchers combed through 19th-century records and found evidence of the species, which joined a menagerie that included Galapagos tortoises and kangaroos

A cat chews up and rolls around in the leaves of the silver vine plant.

When Cats Chew Catnip, It Works as a Bug Spray

Plant leaves that repel mosquitoes release a more effective repellant after being crushed up by felines

Las Salinas in Cabo Rojo National Wildlife Refuge

Puerto Rico

These Salt Flats in Puerto Rico Are Cotton-Candy Pink

The distinct color of Las Salinas comes from a combination of algae, bacteria, salt and water

Blue holes, like the Great Blue Hole in Belize, are vast caverns that descend into the seafloor. Sediment accumulates at the bottom of a blue hole, giving researchers a way to gauge historical hurricane activity.

Blue Holes Show Hurricane Activity in the Bahamas Is at a Centuries-Long Low

Many more powerful storms battered the region in the past

A robotic finger coated with living human skin heals itself after researchers covered it with a collagen bandage.

Innovation for Good

How Humanlike Do We Really Want Robots to Be?

The latest development in robotics wraps a mechanical finger in human skin, leading to broader questions about the future of cyborg technology

Smart windows that tint in response to stimuli such as heat or light, or a user’s preference, are becoming more common, but it may be a while before the tech is mainstream.

What Will It Take for Smart Windows to Go Mainstream?

Specialized glass that keeps heat in during winter and lets it out during summer could make buildings much more efficient

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