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Ammonoids

Susan H. Gray (author)

Publisher: The Child's World ISBN: 9781602537293

These now-extinct cephalods were the predecessors of modern-day squid, octopus, and nautilus and survived for nearly 335 million years! Young readers will discover how these shelled creatures came in myriad shapes, sizes, and designs, and how they managed to outlast several mass extinctions until about 65 million years ago.

Salmon Migration

M. J. Cosson (author)

Publisher: The Child's World ISBN: 9781614731795

Explains how salmon live and grow; discusses their migration, its purpose, and its route; and lists threats salmon may face on their migration.