In this Jan. 13, 2021, file photo a wind turbine is silhouetted against the rising sun Wednesday, Jan. 13, 2021, near Spearville, Kan.

Killer whales that feast on seals and hunt in small packs are thriving while their widely beloved siblings are dying out.

With demand for COVID-19 vaccines outpacing the world’s supplies, a frustrated public and policymakers want to know: How can we get more? A lot more. Right away.

What are the benefits of distance learning for students in a high school setting? In this article, two California educators share how they've structured distance learning with their students — including the advantages of their approach.

America’s rivers are changing color — and people are behind many of the shifts, a new study said.

In this Click & Learn, students explore mathematical models that describe how populations change over time and apply these models to the invasive lionfish population in the Bahamas. They also use data from other species to learn how density-dependent factors limit population size.

Case-based teaching allows for flexibility and adaptability, and case-based learning leads to many positive educational outcomes. In this article, New Jersey educator Missy Holzer explores how to use our salt marsh-related resources in a case study exploring trophic cascades. 

Gorillas are highly sociable animals – up to a point. A crowded mountain can make silverbacks more violent, scientists say.

Gray wolves rebounded in parts of the American West with remarkable speed following their reintroduction 25 years ago.

Tasmanian devils, the carnivorous marsupials whose feisty, frenzied eating habits won the animals cartoon fame, have returned to mainland Australia for the first time in some 3,000 years.

This animation shows how the proton gradient across the mitochondrial membrane powers the ATP synthase enzyme to make ATP. It is the third of three animations about cellular respiration.

This animation shows how the enzyme complexes of the electron transport chain harvest energy from cofactor molecules to pump protons across the mitochondrial membrane and establish a chemical gradient. It is the second of three animations about cellular respiration.