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Possible future discoveries?

Possible Weaknesses

  • More skeleton remains of hominids
  • Animal remains to prove theory that they were killed
  • Footprints
  • Most of the skeletal elements found at AL 333 were bits and pieces.
  • Estimates have fluctuated from five to twenty two individuals.
  • The difference in size between Lucy's petite bones and more massive ones found at Hadar also puzzled paleoanthropologists
  • the fossils show few signs of weathering or attack by predators

First Family of Hadar

Works Cited

http://www.pbs.org/wgbh/evolution/humans/riddle/same.html

(Australopithecus afarensis)

http://www.en.wikipedia.org/wiki/AL_333

http://humanorigins.si.edu/evidence/human-fossils/species/australopithecus-afarensis

Circumstances of the find

By: Jessica Stephan

CHW 3M1

September 27, 2013

Australopithecus Afarensis

Afar Triangle, Ethiopia

Donald Johanson, Paleoanthropologist

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What new information was gained?

  • The individuals of the "First Family" became very useful to study the biological phenomenon of sexual dimorphism.
  • Early testing displayed results that Australopithecus afarensis had similar dimorphism to modern humans.
  • The variation is due to age and not the sex of the individuals.

Summary

  • Discovered in 1975 by Donald Johanson's team in Hadar, Ethiopia (Afar Triangle)
  • 13 individuals -- likely 9 adults and 4 children
  • The "First Family" was found between two layers of volcanic ash, helped to come to the conclusion that the find is about 3 million years old.
  • Consists of the remains of at least thirteen hominids; finds lacked extensive weathering.
  • Believe that Lucy and the family could be the same species
  • The adults of this group varied in height and weight,
  • Males were tall and bulky compared to the females

"Lucy", an Australopithecus afarensis, was found a year before the First Family, and is the most famous of the Hadar discoveries.

  • The First Family of Hadar are extremely important to support the theory of human evolution
  • Killed by an animal
  • All died in a similar time period, but not all at once.
  • All were of the species A. Afarensis

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