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EarthViewer
Click & Learn

Download the accompanying student worksheet under "Downloads." What did Earth look like 250 million years ago? Or 1 billion years ago? Or 4.5 billion years ago? EarthViewer is an interactive tool that allows you to explore the science of Earth's deep history.
Virus Hunters: Epidemiology of Nipah Virus
Activity

In this activity, students will be exploring cases of Nipah virus (NiV) infection as an epidemiologist would, by collecting evidence and making calculations and predictions, based on scientific data.
Central Dogma and Genetic Medicine
Click & Learn

This interactive uses the central dogma as a model for exploring how modern molecular biology technologies can be used to treat genetic diseases.
With A Little Help From My Microbiome
Image of the Week

Koalas are able to spend most of their lives in the relative safety of eucalypt trees by virtue of a digestive system adapted to eating their leaves.
Fellow Travelers
Image of the Week

The human body is home to some thirty-nine trillion microbes that live in or on it.
What van Leeuwenhoek Saw
Activity

This hands-on activity helps students understand concepts related to building scale models by using cards of microorganisms and cells that were first visualized by Antonie van Leeuwenhoek.
Predator-Prey Relationship Dynamics
Data Point

In a study in Greenland, scientists examined whether changes in population densities of Arctic fox are related to changes in population densities of its main prey, the lemming.
Visualizing New Worlds
Image of the Week

Frederic Edwin Church’s oil painting, “The Heart of the Andes” caused quite a stir when it was unveiled in New York on April, 27, 1859
Top Notch Model Organism
Image of the Week

Close-up of cells in a fruit fly eye at the pupal stage stained with antibodies to the Notch protein.
Polychromatic EM
Image of the Week

A new technique for labeling proteins and other molecules allows them to be clearly visualized and localized in cells in color using electron microscopy.
Tracking Genetically Modified Mosquitoes
Activity

Genetically modified mosquitoes have been used to reduce mosquito populations and the diseases they spread. But how can we tell if the method works? In this activity, students analyze data from a field experiment.
Microbial Community Response to an Oil Spill
Data Point

Researchers monitored the succession of the microbial community in the Gulf of Mexico using data from before, during, and after the Deepwater Horizon oil spill.
Population Dynamics
Click & Learn

Explore the exponential and the logistic growth mathematical models that describe how population changes with time.
Portrait of a Howler
Image of the Week

Groups of black howler monkeys (Alouatta caraya) “howl” to each other in the Amazon rainforest during the evening and early morning hours in order to maintain neighborly distances.
Benefits of Schools
Image of the Week

Being in a school affords young barracuda several advantages over the solitary life.
Developing an Explanation for Mouse Fur Color
Activity

Students collect and analyze evidence for each of the major conditions for evolution by natural selection to develop an explanation for how populations change over time.
Firefly Pyrotechnics
Image of the Week

Most firefly species employ characteristic patterns of bioluminescent flashes to elicit responses from potential mates.
Asteroid Impact?
Image of the Week

A living foraminifer, Orbulina universa, in the act of shortening its spines in preparation for gametogenesis.
Using Wolbachia to Suppress Mosquito Fertility
Data Point

In this study, researchers tested whether releasing Wolbachia-infected male Aedes albopictus (Asian tiger mosquitoes) would suppress populations of this mosquito species in their study area.
How Lizards Find Their Way Home
Scientists at Work

(8 min 33 sec) When Dr. Manuel Leal removed lizards from an area in the forest, he noticed an interesting phenomenon: all the lizards seemed to be back the next day. Watch as he sets up an experiment to study how these lizards navigate home. Also available in Spanish.