Tag Archives: gaps

490-Million-Year-Old Arthropod Fossil Reveals Critical Insights into Evolutionary Gaps in the Fossil Record

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A newly discovered species of Corcoranidae arthropod, identified as Magnicornaspis garwoodi, lived during the Furonian period, approximately 497 to 487 million years ago. This well-preserved specimen was unearthed near Quebec, Canada, and provides significant evidence that the Frondian gap—the evolutionary interval between the Cambrian explosion and the Ordovician Great Biodiversity Event—may reflect sampling bias rather than a genuine decline in biodiversity.

Dr. Russell Bicknell from Flinders University noted, “Paleontologists suggest this notable biodiversity decline might be tied to changes in ocean chemistry, a cooling climate, or environmental instability.” He emphasized that “perhaps we’ve overlooked the right sedimentary rocks or fossil-bearing deposits to fully understand the types of mollusks and early forms of life that existed during this period.”

The newly identified Magnicornaspis garwoodi arthropod is distinguished by its broad head shield, segmented body, and defensive spines, and is classified within the Corcoraceae group.

This remarkable specimen was found in the Rivière du Loup Formation near Quebec, Canada, making it one of the few known fossils from the Cambrian and Ordovician periods.

“Fossils play a crucial role in bridging gaps in our understanding of evolutionary history,” Bicknell and his colleagues stated.

“An increasing number of Furonian sites challenge the notion of a barren Late Cambrian world.” They highlighted that “with each new Furonian fossil find, the estimated gap narrows, revealing a more sophisticated ecosystem that thrived during the Late Cambrian.”

“These discoveries hint that Furonian ecosystems were both diverse and ecologically complex,” they added.

Importantly, these specimens come from a geological environment previously unrecognized for its exceptional preservation quality.

The discovery of Magnicornaspis garwoodi fits into a broader pattern of findings over the last two decades.

Dr. Julian Kimmig from Karlsruhe University of Technology and the Karlsruhe National Museum of Nature remarked, “The Frondian gap may not indicate a true biodiversity collapse, but rather a result of where scientific focus has been and the types of rocks studied.”

The discovery of Magnicornaspis garwoodi is detailed in a research paper published in BMC Biology.

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RDC Bicknell et al. 2026. A new, well-preserved arthropod discovered in the Furonian of Canada. BMC Biology 24, 119; doi: 10.1186/s12915-026-02617-4

Source: www.sci.news

Astronomers Discover Protoplanets Forming in Disk Gaps Around Young Solar Analogues

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Astronomers have successfully captured direct images of the 4.9 Jupiter Mass Protoplanet using ESO’s Very Large Telescope (VLT) sphere instruments, revealing clear gaps in the multi-ring protoplanetary disk. The star Whispit 2 (TYC 5709-354-1) is a solar analog, approximately 5 million years old, located 133 parsecs (434 light-years) away in the constellation Aquila.

This image taken with the ESO’s Very Large Telescope captures the first clear observation of a protoplanet within a disk featuring multiple rings. Image credit: ESO/Van Capelleveen et al.

A protoplanetary disk is typically accompanied by a ring and is a disc-shaped structure of gas and dust surrounding a young star.

These disks are the birthplaces of planets, with rings often suggesting the presence of hungry planets within the disk.

Initially, particles within the spinning disk begin to accumulate, drawing in more material from the surrounding disk until gravitational forces take hold, leading to the formation of an embryonic planet.

“Discovering Wispit 2B was an extraordinary experience. We were incredibly fortunate,” stated Dr. Richelle Van Capelleveen, an astronomer at the Leiden Observatory.

“Wispit 2, a younger version of our Sun, belongs to a small group of young stars, and we didn’t anticipate uncovering such an impressive system.”

“This system will serve as a benchmark for many years to come.”

“We’ve encountered many instances in our research,” remarked Christian Ginsky, a researcher at Galway University.

“However, in this case, we detected a remarkably unexpected and beautiful multi-ring dust disk.”

“Upon first encountering this multi-ring disk, I realized I had to attempt to detect the planets within it, immediately requesting follow-up observations.”

Astronomer captured a stunning transparent image of Whispit 2B situated in the gap of the disk, confirming that the planet orbits its host star.

“Wispit 2B marks the first clear detection of a planet on a multi-ring disk, providing an ideal setting for studying the interactions of planetary disks and their evolution,” they noted.

The Wispit 2B was observed in near-infrared light, retaining its brightness and heat from the initial formation phase.

The same is true for planets detected in visible light using the 6.5m Magellan Telescope MAGAO-X AO system and the large binocular interferometer (LBTI) Lmircam instrument.

This detection at specific wavelengths indicates that the planet is actively gathering gas as it develops its atmosphere.

“Located within the birth disk, Wispit 2B exemplifies a planet that can be utilized to explore current models of planet formation,” stated PhD student Chloe Lawler from Galway University.

The researchers estimated the radius of the disk surrounding Wispit 2B to be 380 AU (astronomical units) or about 380 times the distance between the Earth and the Sun.

“The discovery of Wispit 2B is remarkable,” commented Jake Byrne, a student pursuing an M.Sc. at Galway University.

The findings are detailed in two papers published in the Astrophysics Journal Letter.

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Richelle F. Van Capelvein et al. 2025. Wide separation planet (Wispit): A gap clear planet Wispit 2 of a multi-ring disc around a young solar-shaped star. apjl 990, L8; doi: 10.3847/2041-8213/ADF721

Laird M. Crows et al. 2025. Wide Separate Planet (Wispit): Discovery of GAPHα Protoplanet Wispit 2B Magao-X. apjl 990, L9; doi: 10.3847/2041-8213/adf7a5

Source: www.sci.news

This New Experiment Could Bridge the Gaps in Our Theories

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Humanity is now closer to developing an inclusive “all theories” framework to explain the physical universe. A new paper has been published in PRX Quantum.

Three scientists from the US have designed an experiment they believe can bridge the gap between quantum mechanics and Einstein’s general theory of relativity.

Quantum Mechanics elucidates the physics of the subatomic realm, while General Relativity addresses the large-scale universe, encompassing the physics of space, time, and gravity. Unfortunately, the two theories do not align.

“Both quantum theory and Einstein’s gravity theory have undergone rigorous testing and perform exceptionally well,” stated Dr. Igor Pikovsky, an assistant professor of physics at the Stevens Institute in New Jersey, as reported by BBC Science Focus.

“However, one of the greatest challenges in modern physics is to unify these two theories into a single coherent framework. So far, such a joint theory remains elusive.”

Pikovsky, along with Dr. Jacob Coby from the University of Illinois, Urbana-Champaign, and Dr. Johannes Borlegaard from Harvard University, has conceived an experiment to elucidate how these two theories can coexist—an achievement that has never been accomplished before.

The goal? To uncover how quantum effects respond to the curvature of space-time.

The curvature of space-time, as described by Einstein, posits that gravity results from the bending of space and time around massive objects (like planets), causing time to pass more slowly closer to these objects.

Scientists have engineered atomic clock systems interconnected within quantum networks, demonstrating how they are influenced by curved space-time.

Atomic clocks are capable of measuring time with remarkable precision. Through a phenomenon known as entanglement, these quantum states can be interconnected, and the superposition principle allows clocks to experience multiple timeframes simultaneously, due to the unique property of existing in various states at once.

By situating these clocks in diverse locations, the quantum network can identify minute variations in time movement caused by the gravitational distortion of space-time.

“If successful, such a test would represent the inaugural assessment of the ‘quantum theory of curved space-time,’ shedding light on how quantum systems behave within the framework of Einstein’s gravity,” Pikovsky remarked.

Scientists are racing to develop quantum networks to enable future quantum internets that can connect quantum computers globally – credit: via Sakkmesterke

This experiment marks a crucial initial step in testing how these theories might be unified, relying on existing technology.

Pikovsky expressed hope that the paper would kindle “interest and excitement about the numerous mysteries that nature still holds.”

He added:

“Our findings indicate that quantum technology can be harnessed to address some of these questions through real-world experiments for the first time.”

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About our experts

Dr. Igor Pikovsky is an assistant professor of physics at the Stevens Institute in New Jersey, USA. He earned his PhD in Quantum Mechanics from the University of Vienna in 2014. His current research focuses on quantum phenomena, quantum fundamentals, and quantum information science.

Source: www.sciencefocus.com