Echoes of Rock: A Personal Exploration of Earth’s Geological History

The rocks lining Britain’s Jurassic Coast are roughly 185 million years old

James Osmond/Alamy

Whispers of Rock
Anjana Khatwa, Bridge Street Press (UK). Basic Books (USA, releasing November 4th)

Stones are often overlooked. How frequently do we consider the materials beneath our feet, or the origins of the beach pebbles we idly collect?

And how often do we recognize the role of geology when discussing nature and our pressing discussions about climate change? Any efforts towards addressing climate change and the future of our planet must include our relationship with the elements that constitute our world.

We are fortunate to gain insights from geoscientist Anjana Khatwa through her latest book, Whispers of Rock: Stories from Earth. This work, described as “an exhilarating journey through deep time,” is a heartfelt tribute that is sure to resonate with readers. Khatwa has dedicated a significant part of her life to promoting an understanding of geology, providing the scientific detail that highlights her profound knowledge.

In this book, she methodically covers topics such as the formation of mountains, craters, and slate, interspersing fascinating anecdotes. For instance, the iconic Taj Mahal of India, a symbol of love, was constructed from ivory-white Makrana marble that dates back approximately 2 billion years, originating from ancient landmass collisions. This complex genesis involved tectonic shifts, cyanobacteria, photosynthesis, and calcium carbonate, all coming together to create the stones used in this magnificent structure.

Once the scientific framework is laid down, Khatwa breathes life into the narrative of rocks and minerals, transforming it into a sensory experience far removed from the geology classes of my past. She invites readers to appreciate the negative spaces carved in Petra, Jordan, which form breathtaking structures and the unexpected beauty found within. She describes the markings on the stone as remnants of an ancient river, illustrating her deep connection to these geological marvels, becoming a “keeper of the stories of time.”


A recipe that involved tectonic movements, photosynthesis, and more resulted in the marble utilized in the Taj Mahal.

Khatwa’s passion for stones began in her childhood, walking on solidified lava flows in southeastern Kenya. Throughout her book, she takes readers on a global journey, including her hometown of Dorset, England, where she enjoyed 20 years of geological history at the Jurassic Coast World Heritage Site.

This adventure reveals how rocks have shaped her life and the lives of many others. We explore the colossal sarsen stones of Stonehenge in England, delve into the science and folklore of New Zealand’s Ponamu greenstone, and trace the socio-political history of the Black Belt, a fertile region in the American South shaped by cotton plantations after the removal of indigenous communities.

However, what truly distinguishes this book is Khatwa’s personal narrative. She openly addresses the lack of diversity in the environmental sector in the UK and shares her experiences as a mother, imparting a sense of vulnerability along the journey.

She reflects on how she was “transformed by the whiteness of my working environment” and came to realize that her cultural and spiritual identity often took a backseat to her scientific persona. This book is essential reading for anyone grappling with that duality or wishing to understand it better. We stand with Khatwa as she navigates the space between belonging and the feeling of being an outsider.

Whispers of Rock is packed with such insight that it requires contemplation after each chapter. Khatwa is also intentionally provocative, acknowledging that the intersection between science and spirituality may make some readers uncomfortable, as it challenges their preconceived notions. Yet, this provocative approach sparks a genuinely enlightening exploration.

Dhurti Shah is a freelance journalist based in London.

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Source: www.newscientist.com

Physicists Uncover Unusual Quantum Echoes in Niobium Superconductors

Researchers from Ames National Laboratory and Iowa State University have unveiled the emergence of Higgs echoes in niobium superconductors. These findings shed light on quantum behavior that could influence the development of next-generation quantum sensing and computing technologies.

Using Higgs Echo Spectroscopy, Huang et al reveal unconventional echo formation due to non-uniform expansion and soft quasiparticle bands, dynamically evolving under THZ drive. Image credit: Ames National Laboratory.

Superconductors are materials known for conducting electricity without resistance.

These superconducting materials exhibit collective oscillations referred to as the Higgs mode.

The Higgs mode represents a quantum phenomenon that occurs when the electronic potential fluctuates similarly to a Higgs boson.

Such modes manifest when the material experiences a superconducting phase transition.

Monitoring these vibrations has posed challenges for scientists for many years.

Additionally, they interact complexly with quasiparticles, which are electron-like excitations arising from superconducting dynamics.

By utilizing advanced terahertz (THZ) spectroscopy, the researchers identified a new type of quantum echo known as Higgs echo in superconductive niobium materials utilized in quantum computing circuits.

“Unlike traditional echoes seen in atoms and semiconductors, Higgs echoes result from intricate interactions between Higgs modes and quasiparticles, generating anomalous signals with unique properties.”

“Higgs echoes can uncover and reveal hidden quantum pathways within a material.”

By employing precisely-timed THZ radiation pulses, the authors were able to detect these echoes.

These THZ radiation pulses can also facilitate the encoding, storage, and retrieval of quantum information embedded in the superconducting material via echoes.

This study illustrates the ability to manipulate and observe the quantum coherence of superconductors, paving the way for innovative methods of storing and processing quantum information.

“Grasping and controlling these distinctive quantum echoes brings us closer to practical quantum computing and advanced quantum sensing technologies,” stated Dr. Wang.

a paper detailing these findings was published in the journal on June 25th in Advances in Science.

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Chuankun Huang et al. 2025. Discovery of unconventional quantum echoes due to Higgs coherence interference. Advances in Science 11 (26); doi:10.1126/sciadv.ads8740

Source: www.sci.news