The Expression of the Emotions in Man and Animals with his cousin Emma Wedgwood who held firm Christian beliefs. On 21 September 1838, Darwin recorded a confused and disturbing dream in which he was involved in a public execution where the corpse came to life and claimed to have faced death like a hero. In summary: Darwin put together the central features of his evolutionary theory at the same time that he was considering a scientific understanding of human behaviour and family life – and he was in some emotional turmoil. A discussion of the significance of Darwin's early notebooks can be found in Paul H. Barrett's "Metaphysics, Materialism
Emotion in animals as when rolling and rubbing. Therefore, purring can be generally considered as an indicator of "pleasure" in cats. Low pitched bleating in sheep has been associated with some positive-valence situations, as they are produced by males as an estrus female is approaching or by lactating mothers while licking and nursing their lambs. The argument that animals experience emotions is sometimes rejected due to a lack of evidence, and those who don't believe in the idea of animal intelligence, often argue that anthropomorphism plays a role in individuals' perspectives. Those who reject that animals have the capacity to experience emotion do