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Post by Lone Wanderer on Jul 16, 2019 17:22:48 GMT
Extended parental care is considered one of the hallmarks of human evolution. A stunning new research result published today in Nature reveals for the first time the parenting habits of one of our earliest extinct ancestors. New research brings to light for the first time the evolution of maternal roles and parenting responsibilities in one of our oldest evolutionary ancestors. Australopithecus africanus mothers breastfed their infants for the first 12 months after birth, and continued to supplement their diets with breastmilk during periods of food shortage. Tooth chemistry analyses enable scientists to 'read' more than two-million-year-old teeth. Finding demonstrates why early human ancestors had fewer offspring and extended parenting role. "For the first time, we gained new insight into the way our ancestors raised their young, and how mothers had to supplement solid food intake with breastmilk when resources were scarce," said geochemist Dr Joannes-Boyau from the Geoarchaeology and Archaeometry Research Group (GARG) at Southern Cross University. "These finds suggest for the first time the existence of a long-lasting mother-infant bond in Australopithecus. This makes us to rethink on the social organisations among our earliest ancestors," said Dr Fiorenza, who is an expert in the evolution of human diet at the Monash Biomedicine Discovery Institute (BDI). "Fundamentally, our discovery of a reliance by Australopithecus africanus mothers to provide nutritional supplementation for their offspring and use of fallback resources highlights the survival challenges that populations of early human ancestors faced in the past environments of South Africa," said Dr Adams, an expert in hominin palaeoecology and South African sites at the Monash BDI. www.sciencedaily.com/releases/2019/07/190715114241.htm
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sculptor
Full Member
Posts: 121
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Meta-Ethnicity: Homonid
Ethnicity: Sapiens Sapiens
Country: United Kingdon of Great Britain and Northern Ireland
Region: South
Location: Brighton
Ancestry: Homo Sapiens
Taxonomy: Mammalian
mtDNA: From mt EVE
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Hero: My Grandmother
Age: too old
Philosophy: Always
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Post by sculptor on Jul 16, 2019 23:31:11 GMT
Breast feeding for extended periods delays the menstrual cycle from re-starting and acts as a contraceptive. In modern times the Mongols knew this clearly and planned their families by extending the period of lactation by four or more years. This enabled mothers to have only one child to carry as they migrated - or until the first child was capable of riding under their own care. Whether or not dental analysis is adequate to make the statement about Australipithecus is speculative. However this is not unusual since hunter gatherer societies mean lactation is 2.8 years in any case, with Chimpanzees can be as much as five years!! carta.anthropogeny.org/moca/topics/duration-lactation
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