"It's fundamental to survival, but these animals were not displaying it."

In the occasions when they have been present, animals such as dogs usually also display a heightened fear response.

Two years later the animals displayed the signs of kuru.

Predictive models are when the animals strictly display only the treatment characteristics of a disease.

In addition, animals display risk assessment behaviors to the environment previously associated with the cat.

For many years scientists were skeptical that animals could display empathy.

Each time an animal displays a certain behavior, it must weigh the costs and benefits to make a decision.

Most animals display only a casual interest in the dead of their own species.

Many other animals such as the vertebrates, display similar rhythms.

But of the animals clearly displaying healed bites, more than 70 percent had been injured on their right sides.