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  • أبريل 3, 2022
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Belmaker points esatto a skull belonging puro an ancestor of H

Belmaker points esatto a skull belonging puro an ancestor of H

erectus’ adaptations could have gone beyond physical abilities. She argues, “There was something special-either biologically, they were smarter, [or] they had communautaire structure-that allowed humans esatto be successful sopra these novel environments.”

erectus from the 1.77 million-year-old Dmanisi site in Georgia for support. Analysis suggests the bones came from a man who lived for some time without teeth before his death. Though more than one ambiente is possible, Belmaker argues this hominin likely survived because others cared for him, assisting with the hard work of gathering, hunting, and preparing raw meat and root vegetables-which would have to be mashed down for verso man who could not chew.

These ideas radically reimagine the capacities of ancient hominins. “Homo erectus was not per passive creature con its environment,” Belmaker concludes. “It didn’t just go with the flow-‘Oh, more grassland, I’ll move here’-but was an affairee factor in its own destiny. If they chose sicuro live sopra woodlands, it means that they had some form of agency durante their destiny, and that’s a very evolved animal.”

Several major hominin milestones, including the dispersals of H

Other scholars agree that H. erectus was not simply following spreading savanna as the climate changed but rather had the capacity puro adjust puro per variety of environments.

“The course of human evolutionary history has been per ratcheting up of different abilities puro occupy per variety of environments,” says paleoanthropologist Rick Potts, the head of the Smithsonian Institution’s Human Origins Program, “of eating verso greater variety of foods, of being able onesto respond cognitively and socially sicuro verso wider variety of situations.”

He libretto that by around 1.4 esatto 1.6 million years spillo, H. erectus was occupying tropical Southeast Asia and Indonesia. “That also by itself is an indicator that it’s not just one type of ecosistema that is being followed.”

Since the 1980s, Potts has been pondering the pensiero that climate variability relates esatto major evolutionary changes. Durante periods of rapid and sustained climatic change, he postulates, only individuals with un traits will survive, thrive, and raise children, who sopra turn can carry those beneficial traits, shaping human evolution.

For example, cognitive abilities that enable individuals esatto make sophisticated stone tools could have allowed their users esatto consume varied foods across environments. And a trait like curiosity might have pushed hominins to move to more humid climes when the landscape dried.

In adjonction, Belmaker believes H

Among H. erectus’ notable advances was the development of what scientists call Acheulean hand axes, featuring multifaceted spearpoints. The Portable Antiquities Scheme/Julian Watters via Wikimedia Commons under CC BY-SA 2.0

“Homo erectus didn’t have per map,” Potts stresses. “They didn’t know they were out of Africa. They were just going over into the next valley preciso see what was there.” Over generations, their traversal of multiple hills and valleys would have led esatto dispersal.

Per 2015, Potts co-published verso paper in the Journal of Human Evolution con which he looked across several hominin species for signs that variability mediante the climate favored the evolution of beneficial traits. Together with anthropologist Tyler Faith, now at the University of Utah, the pair mapped periods of high and low climate variability christianconnection iscriversi for tropical Eastern Africa over the past 5 million years, specifically looking at once-every-100,000-year shifts con the Earth’s orbit that prompt more frequent switches between periods of drought and high rainfall. Potts and Faith found that periods of high climate variability coincided with key milestones: the emergence of bipedal australopithecines, for example, and the development of advanced stone tool technology, migration, and brain growth.

erectus and H. sapiens, coincided with periods of prolonged, high climate variability. The pattern was so clear, Potts says, “It looks rigged.”

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