Construction method from the Severn Barrage from the English coast to the Welsh coast

Tidal Power: A Forgotten Renewable Resource?

For well over a century, engineers have proposed harnessing the ocean's tides for energy. But the idea hasn't seemed to register in many places.
Freeways in Los Angeles

The Permanent Crisis of Infrastructure

Ever since it entered public consciousness in the 1980s, infrastructure has been synonymous with decline.
Aerial View of Boreal Nature Forest in Summer, Quebec, Canada

Climate Change’s Dangerous Effects on the Boreal Forest

The forest's unique ecosystem protects the world's largest carbon sink—the Earth's permafrost layer. But for how much longer?
Businesspeople working and maintaining social distance on a sofa in a modern office

Here’s Why the CDC Recommends Indoor Masks for the Vaccinated

The CDC guidance applies to areas with high coronavirus transmission rates.
42nd Street in Manhattan, New York

Could More Urban Trees Mitigate Runoff and Flooding?

With climate change comes more flooding. As cities confront the risks and potential damages, trees could become even more important.

Dude, There Are Sand Flies That Consume Cannabis

Could these blood-sucking pests actually have the munchies?
A Spring Peeper rests casually on a garden flower.

Are Peepers Starting to Peep Earlier?

The call of the common frog species Pseudacris crucifer is a reliable marker of spring. Will climate change affect that?
An anti-vaccination pamphlet from 1911, a rally of the Anti-Vaccination League of Canada, 1919, and an Anti-Vaccination Society of America advertisement from 1902

Vaccine Hesitancy in the 1920s

As Progressive Era reforms increased the power of government, organized opposition to vaccination campaigns took on a new life.
Firefighters monitor a controlled burn at Bouverie Preserve on May 30, 2017 in Glen Ellen, California

Smoke Pollution from Prescribed Burns vs. Wildfires

Government can regulate air quality. But some policies on smoke might be self-defeating.
Portrait of astronaut in space suit and helmet

Space Medicine for the Inexperienced Astronaut

The promise of commercial spaceflight raises questions about how untrained travelers will endure the extreme hostility of space.