About: http://webisa.webdatacommons.org/23677879

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	It is called ???unihemispheric sleep.??? Branstetter thinks dolphins evolved this way because they need to breathe at the surface of the water when half-asleep and still remain aware enough to avert predators or other dangers.
http://www.w3.org/ns/prov#wasQuotedFrom	idahoptv.org