This activity explores images of elephants with and without tusks, which serve as phenomena for learning about selection and human impacts on the frequency of traits within populations.

In this activity, students learn about the factors that regulate the population sizes of wildebeest and buffalo in Serengeti National Park.

The flu vaccine did a disappointing job last winter in the U.S., and officials worry that might be a bad sign for the fall.

In this activity, students evaluate a science news article to determine whether it is a trustworthy source of information.

Inside the U.S. and Panama’s long-running collaboration to rid an entire continent of a deadly disease.

In this activity, students find a scientist with whom they can relate in some way and then explore and reflect upon the impact of that scientist’s work.

The world has lost more than one quarter of its land-dwelling insects in the past 30 years, according to researchers whose big picture study of global bug decline paints a disturbing but more nuanced problem than earlier research.

This activity allows students to formulate and analyze scientific questions.

Samoa’s population of “little dodos” is dwindling down to nothing, but the appetites of wealthy people keep putting these rare birds at risk.

Scientists say they have used the gene editing tool CRISPR inside someone’s body for the first time, a new frontier for efforts to operate on DNA, the chemical code of life, to treat diseases.

China cracked down on the sale of exotic species after an outbreak of a new virus in 2002 was linked to markets selling live animals. Now another coronavirus is spreading through China, prompting calls to permanently ban the sale of wildlife.

This activity explores an image of a wildebeest herd on the Serengeti, which serves as a phenomenon for learning about population dynamics and wildlife management.