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  • Larval Biscuit

    Larval Biscuit

    Image of the Week

    A pluteus larva of the sea biscuit, Clypeaster subdepressus, an echinoderm closely related to sea urchins.

  • Finding A Place On The Tree

    Finding A Place On The Tree

    Image of the Week

    Dendrogramma is a newly-discovered species of deep sea siphonophore.

  • Spreadsheet Tutorial 5: Histogram

    Spreadsheet Tutorial 5: Histogram

    Activity

    Generate a histogram using a variety of methods.

  • Spreadsheet Tutorial 4: t-Test

    Spreadsheet Tutorial 4: t-Test

    Activity

    Calculate t-values and perform t-tests using built-in functions.

  • Bird's Eye View

    Bird's Eye View

    Image of the Week

    Unlike the human retina, in which red and green cones are randomly distributed, the five cone types of the bird’s retina are arranged in a highly regular mosaic.

  • Primate in a Pumpkin

    Primate in a Pumpkin

    Image of the Week

    The Aye-Aye is a nocturnal lemur, a member of a group of primates that live only on the island of Madagascar. 

  • Spreadsheet Data Analysis Tutorials

    Spreadsheet Data Analysis Tutorials

    Short Course

    These tutorials are designed to show essential data analysis techniques using a spreadsheet program such as Excel. Follow the tutorials in sequence to learn the fundamentals of using a spreadsheet...

  • Spreadsheet Tutorial 3 -- Column Graphs, Error Bars, and Standard Error of the Mean

    Spreadsheet Tutorial 3 -- Column Graphs, Error Bars, and Standard Error of the Mean

    Activity

    Generate a column or bar graph with standard error bars.

  • Spreadsheet Tutorial 2 -- Autofill Data, Cell References, and Standard Deviation

    Spreadsheet Tutorial 2 -- Autofill Data, Cell References, and Standard Deviation

    Activity

    Generate a table with autofill, and use absolute cell reference to calculate variance and standard deviation.

  • Spreadsheet Tutorial 1 -- Formulae, Functions, and Averages

    Spreadsheet Tutorial 1 -- Formulae, Functions, and Averages

    Activity

    Use formulas and functions to calculate the mean and median.

  • Cracking the Hardest Nut

    Cracking the Hardest Nut

    Image of the Week

    The Large Ground-Finch (Geospiza magnirostris) has the largest beak of all Darwin’s finches on the Galápagos Islands.

  • The Origin of Species

    The Origin of Species

    Collection

    Our planet has millions of species, including thousands of mammals, fish, birds, and reptiles, and even more butterflies, beetles, and other animals, each adapted to one of an enormous variety of...

  • The Lone Anole

    The Lone Anole

    Image of the Week

    The Plymouth anole (Anolis lividus) lizard is found only on the Caribbean island of Montserrat—and it is the only anole species living there.

  • Lizard Evolution Virtual Lab App

    Lizard Evolution Virtual Lab App

    Apps and eBooks

    The Lizard Evolution Virtual Lab app lets you explore the evolution of the anole lizards in the Caribbean on your iOS device.

  • Lizard Evolution Virtual Lab

    Lizard Evolution Virtual Lab

    Virtual Lab

    In the Lizard Evolution Virtual Lab students explore the evolution of the anole lizards in the Caribbean by collecting and analyzing their own data.  

  • Beaks As Tools: Selective Advantage in Changing Environments

    Beaks As Tools: Selective Advantage in Changing Environments

    Activity

    This classroom experiment supports the film The Origin of Species: The Beak of the Finch. Students collect and analyze data to learn why even slight variations in beak size can make the difference between life and death.

  • Anole Lizards: An Example of Speciation

    Anole Lizards: An Example of Speciation

    Animation

    (2 min 38 sec) This animation features the anole lizards as an example of how a single species can split and multiply into many different species with distinct traits.

  • Wallace's Golden Birdwing Butterfly

    Wallace's Golden Birdwing Butterfly

    Image of the Week

    The golden birdwing provided a striking clue to the natural origin of species.

  • Evolution in Action: Data Analysis

    Evolution in Action: Data Analysis

    Activity

    These two activities support the film The Origin of Species: The Beak of the Finch. They provide students with the opportunity to analyze data collected by Princeton University evolutionary biologists Peter and Rosemary Grant.

  • Film Guides: The Origin of Species: Lizards in an Evolutionary Tree

    Film Guides: The Origin of Species: Lizards in an Evolutionary Tree

    Film Guide

    The following classroom-ready resources complement The Origin of Species: Lizards in an Evolutionary Tree. Research on the anole lizards is enriching our understanding of evolutionary processes, such as adaptation by natural selection, convergent evolution, and the formation of new species. Also available in Spanish.

  • Film Guides: The Origin of Species: The Beak of the Finch

    Film Guides: The Origin of Species: The Beak of the Finch

    Film Guide

    The following classroom-ready resources complement The Origin of Species: The Beak of the Finch. By following four decades of research on the finches of the Galápagos islands, the film illustrates how geography and ecology can drive the evolution of new species.

  • Sorting Finch Species

    Sorting Finch Species

    Click & Learn

    Finches discriminate between members of their own species and those of a closely related species based on song and appearance.

  • The Origin of Species: Lizards in an Evolutionary Tree

    The Origin of Species: Lizards in an Evolutionary Tree

    Short Film

    (17 min 45 sec) In the Caribbean islands, adaptation to several common habitats has led to a large adaptive radiation with interesting examples of convergent evolution. Also available in Spanish.

  • The Origin of Species: The Beak of the Finch

    The Origin of Species: The Beak of the Finch

    Short Film

    (15 min 54 sec) Four decades of research on finch species that live only on the Galápagos Islands illuminate how species form and multiply. Also available in Spanish.

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