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.
Cork oak (Quercus suber) pasture near Arcos de la Frontera, Cádiz, Spain.

Plant of the Month: Cork

Why is cork so strongly associated with bottle stoppers? The answer goes back centuries.
An illustration of a woman experiencing information overload

ADHD: The History of a Diagnosis

Attention deficit hyperactivity disorder has been a controversial diagnosis since it was first described, back in the 1940s.
The sun in an orange sky

How Do Scientists Define a Heat Wave?

It seems that every summer brings record temperatures. But there's more to a heat wave than daytime highs.
Copepod

The Little Plankton That Could

Arguably the world's most abundant animal, calanoid copepods can leap like whoa Nelly. And check out their enigmatic embryos!