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Rays are among the largest fishes and evolved from shark-like ancestors nearly 200 million years ago. They share with sharks many life history traits: all speci
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Pages: 145
Type: BOOK - Published: 2019-12-31 - Publisher: Princeton University Press
Manta and devil rays are some of the most intriguing creatures in the ocean. Driven forward by powerful beats of wing-like pectoral fins, these filter feeders s
Language: en
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Pages: 244
Type: BOOK - Published: 1977 - Publisher: W. W. Norton & Company
Language: en
Pages: 132
Pages: 132
Type: BOOK - Published: 2003-05-01 - Publisher: Voyageur Press (MN)
Examines the natural history and evolution of various species of sharks and rays, members of the same subclass, describing their physical characteristics, feedi
Language: en
Pages: 1117
Pages: 1117
Type: BOOK - Published: 2001-07-27 - Publisher: Elsevier
In 1912 Victor Franz Hess made the revolutionary discovery that ionizing radiation is incident upon the Earth from outer space. He showed with ground-based and