An early 20th century drawing of different foods

A Brief History of the Calorie

The measure of thermal energy expended by exercise was adapted from the study of explosives and engines.
CamelBak brand water bottles hang on display at an outdoor supply store

How Safe Is BPA-Free Plastic?

With BPA gone from many plastic products, researchers are concerned about other environmental chemicals, which might cause reproductive harm.
A woman carries a baby wearing a protective mask as they exit the arrival hall at Hong Kong High Speed Rail Station on January 29, 2020 in Hong Kong, China.

The Law and Coronavirus

Can environmental law help contain viruses that spill over from animal to human populations?
Three spoonfuls of red microplastic on a green background.

We Consume a Spoonful of Plastic a Week

You've heard about all the microscopic plastic in our water supply. But did you know there are ways to limit how much you ingest?
An illustration of a syringe and a microscope

The Measles Might Make Your Body “Forget” Its Own Immunity

Scientists have found that sometimes people infected with measles later develop "immune amnesia": their bodies don't remember being sick, even with other viruses.
Medieval depiction of Caesarian birth

How Medieval Surgeons Shaped Sex and Gender

Our ideas about surgically “correcting” intersex conditions go back to a shift in the profession of surgery seven centuries ago.
1971 Oldsmobile Ninety-Eight Ambulance

When Ambulances Were Hearses

The federal government pushed the improvement of emergency services from several directions in the 60s and 70s.

Five Green Living Resolutions for 2020

We won't solve all of the pressing environmental problems, but we can help mitigate some.
Brain organoid

Is It Ethical to Grow a Brain in a Petri Dish?

Brain organoids could be the key to understanding brain diseases, which is why we should think carefully about how far we are prepared to take them.
Molecular model of Penicillin by Dorothy Hodgkin, c.1945

We’re Living in a Post-Antibiotic World

A new CDC report warns: “Stop referring to a coming post-antibiotic era—it’s already here.” Contrast that to a 1944 article on the promise of penicillin.