1 - 12 of 73 results

Sickle Cell: Natural Selection in Humans

This film explores the evolutionary connection between an infectious disease, malaria, and a genetic condition, sickle cell disease.

Genetics
Evolution
Short Films
High School — General
High School — AP/IB
College

Why Can Some Digest Dairy and Others Cannot?

In this activity, students investigate the phenomenon of lactase persistence by making sense of a series of data sets.

Biochemistry & Molecular Biology
Genetics
Evolution
Lessons
High School — General
High School — AP/IB
College
Image of a man walking through the forest.

Does Nature Have Rights?

Release Date
Duration 00:27:51

Ecuador became the first country to enshrine the “rights of nature” in its constitution—granting wild species legal rights to exist. Today, conservationists are using it to save biodiversity hotspots.

The Breathing Biosphere and Human Contribution

In this Click & Learn, students explore factors that contribute to patterns seen in the Keeling Curve: a continuous record of atmospheric CO2 starting in 1958.

Earth Science
Environmental Science
Science Practices
Click & Learn
High School — General
High School — AP/IB
College

Spread of a Lactase-Persistence Allele

This activity guides the analysis of a published scientific figure from a study that investigated how human populations might adapt to milk consumption, both genetically and culturally. 

Evolution
Science Practices
Data Points
High School — General
High School — AP/IB
College

The Science of Climate Change

This film begins with phenomena linked to climate change and then examines how Earth’s temperature is controlled, how we know it is changing, and how the current changes compare to those over the last 800,000 years.

Environmental Science
Earth Science
Short Films
High School — General
High School — AP/IB
College

Pyruvate Dehydrogenase

This animation shows how the pyruvate dehydrogenase enzyme complex converts pyruvate into acetyl-CoA. It is the second of six animations about cellular respiration.

Biochemistry & Molecular Biology
Cell Biology
Animations
High School — AP/IB
College

Glycolysis

This animation shows how glycolysis converts glucose into pyruvate through a series of enzyme reactions. It is the first of six animations about cellular respiration. These animations bring to life the molecular engines inside mitochondria that generate ATP, the main source of chemically stored energy used throughout the body.

Biochemistry & Molecular Biology
Cell Biology
Animations
High School — AP/IB
College

ATP in Use

This animation shows two examples of how the cell uses energy from ATP. It is the sixth of six animations about cellular respiration. These animations bring to life the molecular engines inside mitochondria that generate ATP, the main source of chemically stored energy used throughout the body.

Biochemistry & Molecular Biology
Cell Biology
Animations
High School — AP/IB
College

Laetoli Footprints

This activity explores an image of fossil footprints at Laetoli, which serves as a phenomenon for learning about fossil evidence and human evolution.

Evolution
Phenomenal Images
High School — General
High School — AP/IB

Electron Transport Chain

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 fourth of six animations about cellular respiration. These animations bring to life the molecular engines inside mitochondria that generate ATP, the main source of chemically stored energy used throughout the body.

Biochemistry & Molecular Biology
Cell Biology
Animations
High School — AP/IB
College

Citric Acid Cycle

This animation shows the reactions of the citric acid cycle, which splits off carbon atoms and generates energy-rich reduced forms of cofactor molecules. It is the third of six animations about cellular respiration. These animations bring to life the molecular engines inside mitochondria that generate ATP, the main source of chemically stored energy used throughout the body.

Biochemistry & Molecular Biology
Cell Biology
Animations
High School — AP/IB
College