Okay, so newborns are effectively needy hot water bottles. But instead of looking at their helplessness at birth as a negative thing, we should consider the benefits.
Aradia Wyndhamadvancement factor, altricity, ardipithecine, Australopithecus afarensis, bipedalism, Birth, brain size, coypu, dear hank and john, desilva, dunsworth, evolution, extrauterine spring, featured, fetal constraints, IMMR, Lucy, maternal, metabolism, natural selection, neonataes, newborns, nine banded armadillo, obstetrical dilemma, oxygen, pelvic width, podcast, Portmann, precocious, sambar deer, secondary altricity, social learning, useless, wild boar
Non-human apes don’t need a tool to carry their infants in part because they have body hair for their infants to cling to but it’s more complicated than simply having body hair and a baby that can grasp it.
Aradia Wyndhamafarensis, amaral, apes, arboreal, attachment, Australopithecus, baby feet, baby hands, babywearing, back carry, bipedalism, body hair, chimpanzee, clinging, desilva, dorsal carry, evolution, friction, gibbon, gorilla, grasping, gravity, great apes, hair, hair loss, human, humans, IMMR, infant carrier, infants, invention, Jane Goodall, knuckle walking, Lucy, Mother Nurture, neonates, orangutan, primates, quadrupedal, Ross, Sarah Blaffer Hrdy, static friction coefficient, tensile tester, the great denuding, ventral position, wall-scheffler
Human feet are unique in the ape family, made for walking instead of grasping. For our babies this means two fewer grasping limbs to help cling to their mother, which means that during the evolution of bipedalism, infants had a harder time hanging on. How did our ancestors survive?
Aradia Wyndhamafarensis, almaral, ape, Australopithecus, baby, baby feet, babywearing, bipedalism, Breastmilk, caloric costs, calories, chimpanzee, clinging, desilva, evolution, foot morphology, hominin, human, IMMR, infant, infant carrier, John Reader, laetoli tracks, Lucy, mother, newborns, opposable hallux, palmar grasp reflex, parent, parkers, plantar reflex, primitive, reflexes, riders, selam, tanzania, technology
It’s not just that human babies are helpless at birth, it’s that they’re so huge, at least when we compare them to the size of other apes’ newborns. Fortunately we have all kinds of technology to help us carry them around. But how far back in history were our evolutionary ancestors dealing with these big babies?
Aradia Wyndhamadaptation, afarensis, altricial, attachment, austrolopithecus, babywearing, bipedalism, Birth, body hair, breastfeeding, Breastmilk, carrying, chimpanzee, clinging, desilva, dunsworth, energetic costs, energetics of gestation, foot morphology, gorilla, grasping, hominidae, homo, hrdy, human life history, IMMR, infant carrier, Lucy, mothering, neonatal, ontogeny, parenting, precocity, reflexes, selam, taylor, technology
This work is part of my project, The Evolution of Babywearing, which explores the evolutionary origins of the infant carrier and how it has shaped humanity as we know it. Many moons ago at a family gathering, a relative was complaining about her baby’s fussing, “He won’t let me put him down and he’s so […]
Why is it that some mammals can just leave their babies in a den or nest, while others carry theirs around (or have them cling on) through out the day?
Aradia Wyndhamaltricial, ancestral state, baby sling, babywearing, Beng, biology, bipedalism, bottle feeding, breastfeeding, Breastmilk, Caroline Ross, carrying, chimpanzee, clade, co-adaptations, cooperative breeding, culture, daycare, dens, energetics, eutherian mammals, evolution, human life history, infant carrier, nests, nonnesting, nonoral carriers, parkers, precocious, reproductive cost, reproductive strategies, riders, secondary altricity, technology, triassic period, wall-scheffler