HomeBioInteractiveWeighing the Evidence for a Mass Extinction—In the Ocean


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Weighing the Evidence for a Mass Extinction—In the Ocean


A hands-on activity in which students see first-hand the difference in foraminifera fossils below and above the K-T boundary.

Appropriate for: middle school life science and high school biology (all levels)

This hands-on activity supports the HHMI short film The Day the Mesozoic Died, and in particular Act 1: An Earth-Shattering Hypothesis. Students will make observations and measurements on photomicrographs of research samples of fossilized protists called foraminifera (or forams). Their observations mirror those made by researchers documenting a mass extinction event at the end of the Cretaceous period about 66 million years ago.

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