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Paul Arnold

Paul Arnold

Author

Paul is a versatile freelance writer with a BSc in Biology from the University of London. He worked at the BBC producing science and medical documentaries, traveling the world interviewing scientists in places like Antarctica and the Canadian High Arctic. He now freelances from sunny southern Spain.

Articles by Paul Arnold

Phys.org / The climate cost of staying cool: How AC could impact global warming by 2050

It is a double-edged sword. As the planet heats up, more of us are turning up and turning to air conditioning to keep us cool. The trouble is that, as well as consuming vast amounts of electricity, AC also leads to significant ...

Feb 28, 2026
Phys.org / Missing methane: Countries may be underestimating wastewater greenhouse gas emissions

The amount of greenhouse gases produced by the wastewater sector may be higher than reports suggest. According to a paper published in the journal Nature Climate Change, countries are missing out on reporting a significant ...

Feb 28, 2026
Medical Xpress / Ketamine reduces anxiety and social withdrawal in stressed adolescent mice

Ketamine is a powerful anesthetic used for surgery and acute pain management. But in recent years, it has also gained a reputation as a potential treatment for certain mental health conditions like stress and anxiety. In ...

Feb 28, 2026
Phys.org / Stale bread and bacteria could power a new era in green chemicals

Scientists have found a way to use common bacteria as tiny, green chemical factories to replace a process that currently relies on fossil fuels. In industrial hydrogenation, the hydrogen added to molecules to create products ...

Feb 28, 2026
Phys.org / How a common fungus outsmarts drugs and our immune system

Our bodies are home to millions of fungi that, for the most part, are completely harmless. However, they can sometimes change from peaceful residents into dangerous invaders. One such is Candida parapsilosis, which normally ...

Feb 27, 2026
Phys.org / Size-shifting nanoparticles successfully deliver mRNA medicine to the pancreas

In recent years, mRNA in lipid nanoparticles (mRNA–LNPs) has emerged as a promising strategy for treating numerous conditions, including COVID-19, various cancers and chronic genetic disorders. To date, this technology has ...

Feb 27, 2026
Medical Xpress / A simple energy molecule gives female mice a memory boost

A team of scientists from the U.S. has discovered that acetate, a simple molecule involved in how our bodies create energy, can significantly increase long-term memory in female mice. The researchers were looking for a direct ...

Feb 26, 2026
Phys.org / Sea urchin spines inspire self-powered underwater sensors

Nature does it again! The natural world has a knack for giving us the blueprints for some useful technologies, and the humble sea urchin is the latest contributor. Scientists have designed a new class of smart sensors by ...

Feb 26, 2026
Phys.org / Why plants may bloom earlier: Tiny dew droplets are triggering early flowering in plants

Plants around the world are flowering earlier in the year, a trend attributed to climate change. But there could be another hitherto hidden trigger. Scientists led by researchers at the Chinese Academy of Sciences suggest ...

Feb 25, 2026
Phys.org / Forget flatfooted lumbering T. rex. New research shows it walked on tiptoes

Powerful, fierce and the king of the Cretaceous world, Tyrannosaurus rex was the ultimate apex predator. But it was also surprisingly dainty on its feet, according to new research. Findings published in the journal Royal ...

Feb 25, 2026
Phys.org / How AI can improve the quality of peer review

A new AI coach for scientists has been shown to significantly improve the quality of peer reviews, making them clearer and more helpful for authors. Peer review is essential to ensuring the integrity of scientific publications, ...

Feb 24, 2026
Tech Xplore / A new eco-friendly water battery could theoretically last for centuries

The problem with many types of modern batteries is that they rely on harsh chemicals to work. Not only can these corrosive liquids damage internal parts over time, but they can also leach into soil and water when disposed ...

Feb 24, 2026
Phys.org / Finding the honey bee dance floor: New method shows how it moves within the hive

When honey bees find a good source of food, they return to their hive and perform a waggle dance. It consists of a series of movements that communicate the direction and distance to nectar, pollen or water relative to the ...

Feb 23, 2026
Tech Xplore / New roadmap for evaluating AI morality proposed

Large language models (LLMs) are dealing with an increasing amount of morally sensitive information as people turn to them for medical advice, companionship and therapy. However, they are not exactly known for possessing ...

Feb 23, 2026
Medical Xpress / Faster cancer screening? New AI system offers a better way to detect abnormal cells

One way cancer specialists detect the disease is by examining cells and bodily fluids under a microscope, a time-consuming and labor-intensive process called cytology. It involves visually inspecting tens of thousands to ...

Feb 23, 2026