Welcome to the Animals / Wildlife Newsletter, a weekly newsletter published by About.com's Animals / Wildlife website. For more about animals and wildlife, be sure to stop by the growing library of animal profiles.
| | If you're having trouble viewing this email, click here | | | | The Biggest Threats to Animals and Wildlife | Welcome to the Animals / Wildlife Newsletter, a weekly newsletter published by About.com's Animals / Wildlife website. For more about animals and wildlife, be sure to stop by the growing library of animal profiles. | | Laura Klappenbach Animals & Wildlife Expert | | | The Biggest Threats to Animals and Wildlife | Living things face a constant barrage of external stresses or threats that challenge their ability to survive and reproduce. If a species is unable to successfully cope with these threats through adaptation, they may face extinction. | | | | | Brief History of Life on Earth | To better understand the animals that inhabit our present-day world, it helps to examine the broad history of life. By grasping how organisms, past and present, have evolved and diversified throughout the history of our planet, we can better appreciate the animals and wildlife that surround us today. | | | | | The Basics of Vertebrate Evolution | Vertebrates are a well-known group of animals that includes mammals, birds, reptiles, amphibians, and fish. The defining characteristic of vertebrates is their backbone, an anatomical feature that first appeared in the fossil record about 500 million years ago | | | | | Vertebrates: Famous for Their Backbones | Vertebrates are a group of chordates that includes birds, mammals, fishes, lampreys, amphibians, and reptiles. Vertebrates have a vertebral column in which the notochord is replaced by multiple vertebrae that form a backbone. | | | | | | | | You are receiving this newsletter because you subscribed to the Animals & Wildlife newsletter. If you wish to unsubscribe, please click here | | 1500 Broadway, 6th Floor, New York, NY, 10036 | | | | | | | | |
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