from 'Psychology - The Science of Mind and Behaviour'

by Richard D. Gross

Theories of Sleep (p.115)

"Jouvet placed cats on a small island surrounded by water and allowed them to remain awake or to go into non-R.E.M. sleep. However, whenever they entered R.E.M. sleep, they tended to slip into the water and woke up; prolonged deprivation of R.E.M. produced abnormal behaviour, including hypersexuality and, eventually, death."

Perception (p.267)

"Reisen reared chimps from birth to seven months of age.

Debi [one of 3 chimps] spent the whole time in darkness…

As expected, Debi suffered retinal damage."

Look out for more 'Gross Facts' coming your way, soon!!!