Blue whales have 50-70 throat grooves. Blue whales grow up to about 80 feet (25m) long on average, weighing about 120 tons. The females are generally larger than the males, this is the case for all baleen whales. ^The largest specimen found was a female 94 feet (29m) long weighing more than 174 tons^ (Satchell 1998). The head of the Blue whale forms up to a quarter of the total body length.
KNM-ER 1813. Retrieved April 25, 2014, from Smithsonian website: http://humanorigins.si.edu/evidence/3d-collection/knm-er-1813 Stanford, C., Allen, J. S., & Antón, S. C. (2012). Exploring biological anthropology: The essentials (3rd ed.). Pearson.
2005 June 13. Primate Factsheets: Orangutan (Pongo) Taxonomy, Morphology, & Ecology . Accessed 2014 April 25. • Gron KJ. 2009 October 14.
Females were significantly smaller than males. Height varied between 3'6" and 5'0" and they weighed about 35-50lbs. Australopithecus robustus existed 1-2 million years ago. They had a similar body to that of africanus, but a much larger and more robust skull and teeth. It weighed about 75-200lbs and was about 3.5-4.5 feet tall.