The Dartmouth-led study has made a groundbreaking discovery in Michigan’s Upper Peninsula, uncovering a 1,000-year-old Native American farm system that challenges preconceived ideas about agriculture in the region. The Sixty Islands archaeological site along the Menominee River features a raised ridge field system dating back to around the 10th century to 1600. This is the most complete ancient agricultural site in the eastern half of the United States.

The researchers surveyed approximately 330 acres using drone-based lidar, which provided a dataset that revealed clusters of ridged garden beds ranging from 4 to 12 inches in height. These raised fields were used by ancestors of the Menominee Indian Tribe of Wisconsin to grow corn, beans, squash, and other plants.

Lead author Madeleine McLeester noted that the scale of this agricultural system is 10 times larger than previously estimated, forcing a reconsideration of preconceived ideas about agriculture in the region and globally. The team’s findings also suggest that the ancestral Menominee communities were modifying the soil to rework the topography, using wetland soils to enrich the soil and remain from fires as compost.

The researchers conducted excavations at the site, recovering charcoal, broken ceramics, and artifacts, which suggested that remains from fires and household refuse were likely used as compost in the fields. The results showed that the farming system was a massive undertaking requiring organization, labor, and know-how to maximize agricultural productivity.

The findings have significant implications for our understanding of ancient agriculture in eastern North America and challenge existing forest history of the Upper Peninsula. The team is continuing their work with the Menominee Indian Tribe of Wisconsin at the Menominee Sixty Islands site, planning to survey the site and locate ancestral Menominee villages.

This study demonstrates the importance of innovative technologies like drone-based lidar in uncovering hidden archaeological features and provides a unique window into pre-Colonial farming practices in the region. The discovery of this 1,000-year-old farm system serves as a reminder of the rich history and cultural heritage of the Native American communities that once thrived in Michigan’s Upper Peninsula.

The discovery of a 3,500-year-old cemetery in Hungary has shed new light on a pivotal period in Central European history. A team of international researchers, led by Tamás Hajdu and Claudio Cavazzuti, has conducted a comprehensive bioarchaeological investigation into the Bronze Age cemetery at Tiszafüred-Majoroshalom. The findings have rewritten our understanding of this era, revealing significant changes in people’s lives, diets, social systems, and even burial customs.

The multidisciplinary research was based on the excavation of a Bronze Age cemetery that was used during both the Middle Bronze Age (Füzesabony culture) and the Late Bronze Age (Tumulus culture). By comparing the subsistence strategies before and after this era-changing event, the researchers were able to identify key differences in people’s lifestyles.

The study aimed to answer whether the spread of the Tumulus culture was a result of new groups arriving or if it was simply an evolution of the autochtonous people’s way of life. The team also examined whether changes in settlement patterns around 1500 BC were indicative of a shift towards more mobile and pastoral lifestyles.

The results of this groundbreaking research are nothing short of revolutionary:

* Dietary changes: Nitrogen stable isotope studies revealed that people’s diets became more uniform but poorer during the Late Bronze Age, contradicting previous ideas about the Tumulus culture’s supposed focus on animal husbandry.
* Introduction of broomcorn millet: Carbon isotope analyses indicated that the consumption of this fast-growing and high-energy plant began at the start of the Late Bronze Age, marking the earliest known occurrence in Europe.
* Decreased mobility: Strontium isotope investigations showed that populations from the Middle and Late Bronze Ages had distinct mobility patterns. Fewer immigrants were identified during the Late Bronze Age, with a higher presence of individuals arriving from further geographical regions.

The study’s findings have significant implications for our understanding of this pivotal period in European history. By combining traditional archaeological and anthropological studies with modern bioarchaeological analyses, researchers can now better grasp the complex changes associated with the emergence of the Tumulus culture.

The article begins by describing an extraordinary global seismic signal that occurred in September 2023. A peculiar pattern of earthquakes was observed every 90 seconds over nine days, only to be repeated a month later. Initially, two scientific studies proposed that these anomalies were caused by massive tsunamis triggered in a remote East Greenland fjord due to the warming of an unnamed glacier. The resulting waves became trapped in the fjord system, creating standing waves (seiches) that undulated back and forth.

However, despite extensive research, no direct observations of these seiches existed until now. Not even a Danish military vessel visiting the fjord three days into the first seismic event was able to detect the wave responsible for the mystery signals.

A new study from researchers at the University of Oxford has employed cutting-edge analysis techniques on satellite altimetry data from the Surface Water Ocean Topography (SWOT) mission, launched in December 2022. The SWOT satellite measures ocean and surface water levels with unprecedented accuracy along a swath 30 miles wide using its Ka-band Radar Interferometer (KaRIn) instrument.

Utilizing KaRIn data, the researchers created elevation maps of the Greenland Fjord at various time points following the tsunamis. These maps showed clear, cross-channel slopes with height differences of up to two meters. Crucially, the slopes in these maps occurred in opposite directions, indicating that water moved backwards and forwards across the channel.

To confirm their theory, the researchers linked these observations to small movements of the Earth’s crust measured thousands of kilometers away, reconstructing weather and tidal conditions to rule out alternative explanations.

Lead author Thomas Monahan stated: “Climate change is giving rise to new, unseen extremes. These extremes are changing the fastest in remote areas, such as the Arctic, where our ability to measure them using physical sensors is limited. This study shows how we can leverage the next generation of satellite earth observation technologies to study these processes.”

Co-author Professor Thomas Adcock added: “This study is an example of how the next generation of satellite data can resolve phenomena that has remained a mystery in the past. We will be able to get new insights into ocean extremes such as tsunamis, storm surges, and freak waves. However, to get the most out of these data we will need to innovate and use both machine learning and our knowledge of ocean physics to interpret our new results.”