Oxygen, as a scientific topic, encompasses the study of the element with atomic number 8, its diatomic molecular form (O₂), and its reactive allotropes and species (e.g., O₃, reactive oxygen species). Research addresses its physicochemical properties, electronic structure, and behavior in gaseous, liquid, and solid phases, as well as its central role in redox reactions, combustion, and bioenergetics. The topic also includes oxygen transport and utilization in biological systems, oxygen cycles in environmental and Earth system science, and its involvement in oxidative stress, signaling pathways, and industrial processes such as oxidation catalysis and materials processing.
The most widely accepted scientific explanation for the arrival of all complex life on Earth has had an unsolved mystery at its heart. According to the theory, all plants, animals and fungi, known collectively as eukaryotes, ...
Evolution
Feb 18, 2026
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Recently, a research team led by Prof. Zhao Bangchuan from the Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, in collaboration with Prof. Xiao Yao from Wenzhou University, ...
Nanophysics
Feb 14, 2026
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40
Oxygen is a vital and constant presence on Earth today. But that hasn't always been the case. It wasn't until around 2.3 billion years ago that oxygen became a permanent fixture in the atmosphere, during a pivotal period ...
Evolution
Feb 6, 2026
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Scientists at Oregon State University have developed a new nanomaterial that triggers a pair of chemical reactions inside cancer cells, killing the cells via oxidative stress while leaving healthy tissues alone. The study ...
Bio & Medicine
Jan 27, 2026
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A team of scientists announced Tuesday they have developed new deep-sea landers specifically to test their contentious discovery that metallic rocks at the bottom of the ocean are producing "dark oxygen".
Earth Sciences
Jan 20, 2026
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For roughly 2 billion years of Earth's early history, the atmosphere contained no oxygen, the essential ingredient required for complex life. Oxygen began building up during the period known as the Great Oxidation Event (GOE), ...
Astrobiology
Dec 9, 2025
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81
A new study has revealed how phosphorus, a nutrient essential for photosynthesis, surged into ancient oceans and started Earth's first major rise in atmospheric oxygen more than 2 billion years ago.
Astrobiology
Oct 20, 2025
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The appearance of oxygen in Earth's atmosphere was a turning point in the history of our planet, forever transforming the environment and setting the stage for complex life. This event, known as the Great Oxidation Event ...
Astrobiology
Oct 9, 2025
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82
Earth was not always the blue-green world we know today: early Earth's oxygen levels were about a million times lower than we now experience. There were no forests and no animals. For ancient organisms, oxygen was toxic. ...
Ecology
Sep 25, 2025
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47
Oxygen, the colorless and odorless gas that is essential to the survival of humans and other living organisms, is estimated to make up around 21% of Earth's atmosphere. While the primary properties of oxygen are now well ...
