In the ever-evolving world of science, remarkable advancements are continuously illuminating the mysteries of our prehistoric past and the living beings that once roamed our planet.
A potentially rich source of ancient DNA has now come to light, surprising researchers as they have successfully pieced together the mitochondrial genome of the long-extinct wooly rhinoceros (Coelodonta antiquitatis).
Scientists learnt more about the extinct European wooly rhinoceros through 14,000-year-old hyena poop
Image credits: Encyclopedia Britannica
Scientists have been using genetic material extracted from fossilized excrement left behind by cave hyenas (Crocuta crocuta spelea) that consumed the large mammal as a meal, according to Science Alert.
This marks the inaugural recovery of a genome for the European wooly rhinoceros, as all prior genetic data pertaining to this species originated from Siberian specimens.
This development not only holds the potential to offer insights into potential regional distinctions among rhino herds but also underscores the significance of fossilized feces, or coprolites, as a valuable scientific resource.
A study was conducted on two fossilized hyena excrements dating back to the Middle Paleolithic era in what is present-day Germany
Image credits: Wikipedia Commons
The researchers wrote in their paper: "The mitogenome assemblies produced here are the first mitogenomic records of European wooly rhinoceros and are thus an important resource to help resolve the phylogeography of this iconic Pleistocene megafauna species.
"The fact that these were retrieved with relative ease from a coprolite of another species (i.e. no remain associated directly to wooly rhinoceros was needed) stresses the value of obtaining genomic data from a wide range of materials."
As it turns out, archaic dookies have emerged as a treasure trove of historical information, the publication states.
These preserved fecal remnants enable current researchers to deduce the diets of both ancient humans and animals, examining the parasites that afflicted them, and investigating shifts in the human gut microbiome over time.
This discovery offered insights into potential regional distinctions among rhino herds and fossilized feces as a valuable scientific resource
Image credits: Wikipedia Commons
Led by molecular biologist Peter Andreas Seeber from the University of Konstanz in Germany, a research team conducted a study on two fossilized hyena excrements dating back to the Middle Paleolithic era in what is present-day Germany.
This epoch extends from approximately 300,000 to 30,000 years ago.
These particular coprolites had been unearthed during excavations and had been resting in museum collections, much like many coprolites today.
A research paper published the previous year emphasized the untapped potential of these ancient droppings within museum collections as invaluable resources for delving into the biological history of our planet.
Peter and his team employed specialized methods to extract material from within the coprolites, processed the DNA for analysis, and subsequently subjected the findings to DNA sequencing.
Thanks to hyena poop, scientists found that the European rhinos and their Siberian counterparts separated almost half a million years ago
Image Credits: Rupert van Der Werff/Getty Images
Despite the DNA's degradation, the scientists successfully salvaged genetic material from both the cave hyena and the woolly rhinoceros.
They then proceeded to compare these genetic profiles with other genomes, encompassing both contemporary and ancient specimens.
Remarkably, even with just a single rhino DNA sample, the research offered fresh insights into the species and its evolutionary spread across the vast Eurasian landmass.
Surprisingly, the discrepancy in genetic makeup between the European rhinoceros, which became a meal for hyenas, and their Siberian counterparts suggests that these two groups embarked on a process of divergence quite a long time ago.
The separation of European rhinos from their Siberian counterparts likely commenced between 2.5 million and 150,000 years in the past.
The new findings may also be relevant today in light of the current climate crisis
Image credits: Wikipedia Commons
This discovery stands in direct contrast to the hypothesis proposing repeated range expansions of rhinos into Western Europe during the late Pleistocene, at least concerning the particular rhino in question.
Continued efforts to recover and analyze the DNA of these ancient and majestic rhinoceroses promise to unveil further facets of their history, even if this valuable information has to be extracted from a source as unglamorous as extremely old poop.
Researchers wrote: "As with these samples, many archaeological objects retrieved in past excavations and existing in collections, are to date a largely overlooked source of ancient DNA."
The discoveries contradict the hypothesis proposing repeated range expansions of rhinos into Western Europe during the late Pleistocene
Image credits: Wikipedia Commons
Moreover, Peter told IFLScience that the findings may also have relevance today, especially in light of the current climate crisis.
He said: “Insights into the population dynamics of (sub)species that have gone extinct probably because of a changing climate may help predict future developments and the fate of extant wildlife populations.”
History enthusiasts rejoiced at the groundbreaking discovery
