Since the beginning of man, it was thought that animals had no intelligence what so ever, therefore we have no responsibilities towards them. Ancient day Philosophers believed that animals are unconscious biological organisms, which operate, by brute instinct, and only appear to be capable of experiencing pain. Modern philosophers and scientists believe differently. They believe n

early all the external signs lead us to believe that pain in humans can be seen in other species, especially the species most closely related to us, mammals and birds. The behavioral signs include writhing, facial contortions, moaning, yelping or other forms of calling, attempts to avoid the source of the pain, appearance of fear at the prospect of its repetition.

With the help of animal research today, smallpox has been wiped out worldwide. Microsurgery to reattach hearts, lungs, and other transplants are all possible because of animal research. Since the turn of the century, animal research has helped increase our life span by nearly 28 years. And now, animal research is leading to dramatic progress against AIDS and Alzheimer's disease. Working with animals in research is necessary. Scientists need to test medical treatment

Some common words found in the essay are:
, AIDS Alzheimer's, animal research, animal research people, eating meat, eat meat, fur coats, research people,
Approximate Word count = 560
Approximate Pages = 2 (250 words per page double spaced)