Indigenous women engineered energy-efficient baby carriers
Indigenous women have long been overlooked as technological innovators, yet their contributions to tools and practices that supported their communities are profound. A recent study led by Alexandra Greenwald, curator of ethnography at the National History Museum of Utah, seeks to highlight these contributions, particularly focusing on the cradleboard—a traditional baby carrier used by various Indigenous cultures. The cradleboard not only showcases the ingenuity of Indigenous women but also serves as a vital tool that allowed them to balance familial responsibilities with foraging activities. Greenwald emphasizes that traditional knowledge and Western scientific methods can converge to validate the effectiveness of such innovations, as many Indigenous women have relied on cradleboards for generations to safely carry their infants while gathering food.
Historically, the narrative surrounding Indigenous cultures has often been skewed, frequently emphasizing male contributions, particularly in hunting, while neglecting the critical roles women played in sustenance and community well-being. Greenwald points out that despite the archaeological focus on male-dominated activities, women in hunter-gatherer societies have been responsible for up to 75 percent of caloric intake, primarily through the gathering of reliable plant resources. The cradleboard, crafted from materials like willow and dogwood in Apache communities or Ponderosa pine and buckskin in Navajo culture, exemplifies how Indigenous women ingeniously adapted their tools to enhance their efficiency in foraging while ensuring their children were safe and secure.
To empirically demonstrate the cradleboard’s effectiveness, Greenwald and her team conducted a series of experiments comparing the foraging efficiency of participants using cradleboards, slings, and no carrying device at all. The results were telling: those using cradleboards not only gathered more acorns but did so in a way that maximized their energy expenditure. This research underscores the critical role of women in the survival and health of their communities, challenging the longstanding biases that have minimized their contributions. Greenwald’s work not only aims to rectify historical narratives but also celebrates the scientific and mathematical prowess of Indigenous women throughout history, reinforcing their status as essential contributors to their societies.
Indigenous
women were technological trailblazers. But while lived experiences and communal histories have long supported this, they routinely
fail to receive the credit they deserve
. A group of researchers are using clinical experiments to showcase these inventions and finally give credit where it’s due. According to
National History Museum of Utah
’s curator of ethnography
Alexandra Greenwald
, one of the best examples of Indigenous women’s ingenuity undoubtedly remains the baby cradleboard.
“Any Indigenous woman who’s had their infant in a cradle could tell you exactly what I’m about to tell you, through traditional knowledge,” Greenwald
said in a recent University of Utah profile
. “Traditional ways of knowing and western science ways of knowing are different, but they can arrive at similar, complementary conclusions.”
A history of bias
Outside anthropologists, archaeologists, and historians have presented
skewed versions of Indigenous culture
for generations. These also usually fall along biased gender dynamics. For example, it’s common to hear claims that men provided most of a community’s food through hunting. But primary records, ecology, and common sense says otherwise.
“Everyone is so focused on men, meat, and stone tools because bones and stone tools preserve so well in the archaeological record. But that doesn’t mean that was the only thing that was happening,” Greenwald explained.
In a study published earlier this year
in the
American Journal of Biological Anthropology
, Greenwald and colleagues noted that even today, women in the world’s remaining hunter-gatherer populations still provide as much as 75 percent of their community’s caloric needs. They don’t do this by tackling the biggest game animals they can find, but by focusing on reliable, seasonal plants and crops. And all the while, they’re still birthing and raising children.
What is a cradleboard?
So, how did these women juggle both familial and foraging responsibilities? With tools like the cradleboard.
Examples of the technology
stretch back thousands of years across Indigenous cultures around the world. In Apache communities, a cradleboard is woven from willow, dogwood, and other plant fibers. Meanwhile, Navajo baby carriers are built from a Ponderosa pine frame laced with buckskin straps. The detailed designs kept babies safe and prevented them from crawling away while women worked. When on the move, mothers simply strapped the cradles to their backs or carried them to the next location before setting them down to continue their daily tasks. The benefits go beyond convenience and safety. Cradleboards essentially function as Indigenous foraging lifehacks.
To showcase their utility, Greenwald set up a trio of trial experiments. After consulting with tribal community representatives, her team documented three different foraging scenarios: participants wearing a cradleboard, participants wearing a sling, and another scenario without either accessory. Before donning the cradleboards and slings, researchers also stuffed them with a 10 pound sandbag to approximate the size and proportions of a 1 to 2 month old infant.
After volunteers fasted, Greenwald measured their metabolic base rates, then attached heart rate monitors, accelerometers, GPS devices, and respirometers. From there, they tasked participants to cycle through each test group while gathering acorns from a preselected area to guarantee uniform foraging scenarios.
A Diné (Navajo) baby on a cradleboard with a lamb approaching, Window Rock, Arizona, 1936. Credit: H. Armstrong Roberts, from the U.S. National Archives
Indigenous scientists and mathematicians
Researchers already knew unencumbered gatherers would amass the most acorns while burning the fewest calories. But after excluding the control group, cradleboard wearers gathered far more acorns than those who donned a sling. Interestingly, the cradle group also burned more calories, but Greenwald said this actually makes sense. Once they set the cradlebacks on the ground, foragers could move even more quickly while gathering more acorns. Despite the caloric difference, however, cradles were comparatively the most efficient baby-carrying tool.
“Humans, especially women, have been scientists and mathematicians, experimenting for time immemorial, figuring out their landscape, what is safe, what is not safe,”
said Greenwald
.
According to the study’s authors, you really don’t need clinical trials to see evidence of the cradleboard’s usefulness.
“The utility of cradle carrying is not only reflected in the increased return rate of the method, but it is also emphasized by its rapid expansion across western North America after the prehistoric development of the technology among Basketmaker peoples in the Southwest,” they
wrote in the study
.
Regardless of how Indigenous peoples carried their children while foraging, the team also explained how vital women were to their community’s survival and health.
“This study empirically demonstrates the importance of maternal foraging contributions to hunter-gatherer subsistence economies, and undermines the notion that females of reproductive age rely primarily on male hunting efforts,” they concluded.
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Indigenous women engineered energy-efficient baby carriers
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