New Study Suggests Tunisia May Be the Origin of Today’s Domestic Cats

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New Study Suggests Tunisia Could Be the Birthplace of Domestic Cats

The origin of domestic cats has long intrigued researchers, with many linking their domestication to the Neolithic period, where they likely accompanied early farmers, spreading across Europe alongside agricultural development. However, recent investigations have raised new questions, suggesting that the birthplace of domestic cats may have been in Tunisia. Two major studies, one led by the University of Rome Tor Vergata and another by the University of Exeter, have proposed that Tunisia could be the key region in the early domestication of cats, adding complexity to the existing theories.

The University of Rome Tor Vergata conducted an extensive paleo-genomic analysis to uncover the origins of domestic cats. Researchers studied specimens from 97 archaeological sites spanning Europe and Anatolia, with additional samples from North Africa, Bulgaria, and Italy. Their findings, published on bioRxiv, involved examining 70 low-coverage ancient genomes, 37 radiocarbon-dated cat remains, and 17 modern and museum genomes. This wide-reaching research sought to track the movement of domestic cats across ancient civilizations and identify their domestication timeline.

The results of the Tor Vergata study revealed that cats with domestic ancestry began appearing in Europe around the first century CE. The research identified two distinct waves of cat introductions: one during the second century BCE, where wildcats from Northwest Africa were brought to Sardinia, and another during the Roman Imperial period. The second wave showed a stronger genetic link to domestic cats found across Europe. Notably, the study highlighted Tunisia as the potential center for the early domestication of these animals, suggesting that the region played a crucial role in their spread into Europe.

Meanwhile, the University of Exeter’s collaborative study, which involved 37 institutions and analyzed 2,416 archaeological field bones from 206 sites, provided further insight into the cat domestication timeline. Their research, published under the title “Redefining the timing and circumstances of cat domestication,” suggested that domestic cats appeared in Europe as early as the first millennium BCE, predating the expansion of the Roman Empire. By cross-referencing genetic and morphological data, the Exeter study further supports the notion that the domestication of cats occurred much earlier than previously believed, with North Africa, and particularly Tunisia, playing a pivotal role in their spread to Europe.

Study Suggests Earth’s Mantle May Contain an Ancient Ocean of Magma Formed Billions of Years Ago

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A groundbreaking study published in Nature on March 26 reveals that Earth’s mantle may harbor remnants of an ancient ocean of magma that formed around 4.4 billion years ago. This molten layer, situated near the boundary between Earth’s mantle and core, could be influencing the planet’s geological activity today, manifesting as unusual mantle anomalies. The research sheds light on the large-scale structures within the Earth’s interior, such as the Large Low-Velocity Provinces (LLVPS), which were identified using advanced seismic imaging techniques. These discoveries suggest that the formation of a magma ocean in Earth’s early history played a pivotal role in shaping the planet’s thermal and tectonic evolution.

The study, led by Assistant Professor Charles-Édouard Boukaré from York University, Toronto, proposes that the magma ocean, formed deep within Earth’s interior, could be affecting the thermal communication between the mantle and the core. This interaction, in turn, might influence the behavior of tectonic plates and the dynamics of Earth’s surface. According to Boukaré, this molten layer is a key element in understanding the current behavior of Earth’s geological processes, highlighting how ancient conditions continue to impact the planet today.

In their study, Boukaré and his team, including James Badro and Henri Samuel from French research institutions, combined geochemical and seismic data to develop a new model explaining how early crystallization in Earth’s interior led to the formation of this persistent magma ocean. The team proposes that dense, iron oxide-rich solids sank towards the core under extreme temperatures and pressures, remelting into a permanent ocean of magma. This model suggests that such a magma ocean formed regardless of how Earth’s mantle solidified, whether from the core outwards or vice versa, challenging previous assumptions about the planet’s internal evolution.

The lasting effects of this ancient magma ocean are believed to have shaped the internal structure of Earth, leaving a geological “memory” that continues to influence tectonic movements and mantle convection. The LLVPS, which date back over 4.4 billion years, are thought to be remnants of this primordial magma layer, providing a tangible link to the early history of the planet. Boukaré’s findings offer a fascinating glimpse into the Earth’s deep past, suggesting that the imprint of the magma ocean still affects geological processes, influencing the shape and dynamics of the planet as we know it today.

Looking beyond Earth, Boukaré is eager to expand the model to other rocky planets. His research could offer valuable insights into the formation of planets across the solar system, potentially revealing that magma oceans were not unique to Earth but may have been a common feature in the early history of other rocky worlds. This work could open new avenues in planetary science, helping scientists better understand the processes that shaped not only Earth but also its neighboring planets.

Researchers Discover Strange ‘Failed Star’ Planet Orbiting Double Star System in the Milky Way

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Astronomers Discover Rare Polar-Orbiting Planet in Unusual Double-Brown-Dwarf System

Astronomers have uncovered an extraordinary planet in the Milky Way, orbiting in an unusual way around two failing stars. Unlike most exoplanets, this planet orbits over and under the poles of its parent stars, rather than following the plane of their orbits. Prior to this discovery, only sixteen exoplanets were known to orbit binary star systems, all of which moved in the plane of the stars’ mutual orbits. The discovery of a planet following a polar orbit in such a system has captured the attention of the scientific community, adding a new layer of intrigue to the study of planetary formation.

The two brown dwarfs that the planet orbits had already been identified by astronomers in 2018, using the SPECULOOS Southern Observatory in Chile. Brown dwarfs, often referred to as “failed stars,” are celestial objects that do not possess enough mass to ignite nuclear fusion in their cores. When the researchers turned their attention to the pair using the Very Large Telescope in Chile, they realized that these brown dwarfs, while not full-fledged stars, could still host fascinating systems.

This discovery marks the first time a “polar planet” has been observed orbiting a pair of brown dwarfs. These bodies, which are too small to sustain nuclear fusion, remain a subject of fascination because of their unique characteristics. The planet, designated 2M1510 (AB) b, is the first known exoplanet in such a system, providing solid evidence that fully formed planetary systems can exist around these “failed stars.” The fact that a binary brown dwarf system could support a planet in such an unusual orbit is a breakthrough in our understanding of stellar and planetary formation.

In addition to being a polar-orbiting planet, the system is also only the second pair of eclipsing brown dwarfs ever discovered, where one brown dwarf eclipses the other from Earth’s viewpoint. This rare configuration makes the discovery even more significant. As Amaury Triaud of the University of Birmingham points out, “A planet orbiting not just a binary, but a binary brown dwarf, as well as being on a polar orbit, is rather incredible and exciting.” The discovery was an unexpected bonus, as the team was not originally aiming to find such a system, underscoring the serendipitous nature of astronomical research.