When Did The First Mammals Show Up
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Extinction and Radiation
This study identifies the fall of dinosaurs as the factor that allowed mammals to evolve into the dominant tetrapod form. It refutes the single-cause impact theory for dinosaur extinction and demonstrates that multiple factors--massive volcanic eruptions, loss of shallow seas, and extraterrestrial impact--likely led to their demise. While their avian relatives ultimately survived and thrived, terrestrial dinosaurs did not. Taking their place as the dominant land and sea tetrapods were mammals, whose radiation was explosive following nonavian dinosaur extinction. The author argues that because of dinosaurs, Mesozoic mammals changed relatively slowly for 145 million years compared to the prodigious Cenozoic radiation that followed. Finally out from under the shadow of the giant reptiles, Cenozoic mammals evolved into the forms we recognize today in a mere ten million years after dinosaur extinction.
The Bare Bones
Author: Matthew F. Bonnan
language: en
Publisher: Indiana University Press
Release Date: 2016-02-15
“Bonnan combines wit and passion with the sensibilities of a talented instructor in this encyclopedic tour of the vertebrate skeleton.” —Publishers Weekly What can we learn about the evolution of jaws from a pair of scissors? How does the flight of a tennis ball help explain how fish overcome drag? What do a spacesuit and a chicken egg have in common? Highlighting the fascinating twists and turns of evolution across more than 540 million years, paleobiologist Matthew Bonnan uses everyday objects to explain the emergence and adaptation of the vertebrate skeleton. What can camera lenses tell us about the eyes of marine reptiles? How does understanding what prevents a coffee mug from spilling help us understand the posture of dinosaurs? The answers to these and other intriguing questions illustrate how scientists have pieced together the history of vertebrates from their bare bones. With its engaging and informative text, plus more than 200 illustrative diagrams created by the author, The Bare Bones is an unconventional and reader-friendly introduction to the skeleton as an evolving machine. “No bones about it, a text like The Bare Bones was sorely needed in the popular literature of vertebrate paleontology. Matthew Bonnan’s tome on the evolution, form, and function of the vertebrate skeleton may seem daunting in size, but it is written in an enjoyable and readable fashion that will absolutely delight all sorts of readers from expert to soon-to-be-expert.” —Palaeontologia Electronica “A remarkably fun book to read . . . his conversational style and wit make this an unintimidating yet highly informative book that would work wonderfully in college courses.” —The Quarterly Review of Biology
Amazing Facts About Mammals, Grades 5 - 8
Connect students in grades 4 and up with science using Amazing Facts about Animals. This 128-page book features creatures from North and South America, Asia, Australia, Africa, the ocean, and the farm. The book includes puzzles, logic problems, myth busters, and scientific mysteries to pique student interest. It also includes reproducibles and answer keys.