The exact origin of the dog is unknown, yet it is an animal that is depicted even in the earliest drawings as a distinct animal. What is known about the dog is that it is the oldest domesticated animal. It seems that almost from the beginning there was a man and a dog and the two formed a relationship. Dogs have had a profound influence on the human race. From helping hunt for food to protecting, dogs have influenced the very evolution of humanity. ...

• Word Count: 3100
• Approx Pages: 12
• Grade Level: High School

If the sound is a fire alarm or something that might be a danger, the dog will lie down to indicate the sound as danger ("About Hearing Dogs for Deaf People").  ... They are also trained to recognize and respond to the sound of a doorbell, alarm clock, someone calling a name, or a smoke alarm. ...

• Word Count: 2645
• Approx Pages: 11
• Has Bibliography