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mass extinction event: Media
biology
Videos
What are the different types of extinction?
The die-off of the dinosaurs is different from the extinction of the dodo.
ozone depletion's connection to mass extinction
An experiment showing how pine trees become temporarily sterile when exposed to intense...
Images
near-Earth object: impact
The impact of a near-Earth object 66 million years ago in what is today the Caribbean...
NASA; illustration by Don Davis
ammonite fossils
Ammonoids are extinct cephalopods that date from the Devonian Period. Ammonoids disappeared...
www.goodfreephotos.com
computer-generated image of the Chicxulub crater
Chicxulub crater, on the northern coast of the Yucatán Peninsula in Mexico, in a...
V.L. Sharpton, University of Alaska, Fairbanks; NASA
trilobite
The trilobite Modocia typicalis lived during the middle of the Cambrian...
iStockphoto/Thinkstock
marine family diversity
The diversity of marine animal families since late Precambrian time. The data for...
Encyclopædia Britannica, Inc.
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