Search results for oxygen isotope ratio

Earth Sciences Feb 11, 2026

New experiments suggest Earth's core contains up to 45 oceans' worth of hydrogen

Scientists have long known that Earth's core is mostly made of iron, but the density is not high enough for it to be pure iron, meaning lighter elements exist in the core, as well. In particular, it's suspected to be a major ...

Earth Sciences Feb 2, 2026

Distinct isotopes of combustion-derived water vapor identified

Water vapor (H2Ov) is an essential component of Earth's atmosphere, playing critical roles in climate regulation, weather patterns, and the water cycle. Its sources primarily come from natural processes such as ocean evaporation ...

Evolution Jan 23, 2026

How microbial fossils illuminate life's origins

More than 3.5 billion years ago, the Earth was not the hospitable world we know today. The atmosphere lacked oxygen, the seas were acidic and rich in iron, and volcanic activity roared across a barren landscape. Yet, in this ...

Archaeology Jan 13, 2026

Hygienic conditions in Pompeii's early baths were poor, according to isotope analysis

The city of Pompeii was buried by the eruption of Mount Vesuvius in AD 79. Researchers at Johannes Gutenberg University Mainz (JGU) have now reconstructed the city's water supply system based on carbonate deposits—particularly ...

Planetary Sciences Jan 8, 2026

The electrifying science behind Martian dust

Mars, often depicted as a barren red planet, is far from lifeless. With its thin atmosphere and dusty surface, it is an energetic and electrically charged environment where dust storms and dust devils continually reshape ...

Paleontology & Fossils Dec 12, 2025

Sea reptile's tooth shows that mosasaurs could live in freshwater

Mosasaurs, giant marine reptiles that existed more than 66 million years ago, lived not only in the sea but also in rivers. This is shown by new research based on analyses of a mosasaur tooth found in North Dakota and believed ...

Environment Nov 25, 2025

In a new documentary, researchers investigate when Greenland was ice-free

Approximately 400,000 years ago, some areas of Greenland that are now covered by a thick layer of ice were exposed to fresh air and sunlight. Today, the Greenland Ice Sheet covers most of the land mass, but the southwestern ...

Space Exploration Nov 5, 2025

Self-replicating probes could be operating right now in the solar system; here's how we could look for them

In 1949, famed mathematician and physicist John von Neumann delivered a series of addresses at the University of Illinois, where he introduced the concept of the "universal constructor." The theory was further detailed in ...

Astrobiology Oct 29, 2025

Postcards from ancient Mars: Isotopes illuminate early Martian climate

A new analysis of chemical signatures measured by NASA's Curiosity Rover gives a peek at Mars's past to a time some 3.7 billion years ago, when it was warmer and wetter.

Earth Sciences Oct 29, 2025

Meteorite-like oxygen isotope ratios in ancient plants may unlock Earth's climate history

A team of researchers at The University of New Mexico has uncovered how a peculiar, prehistoric plant might unlock new ways to reconstruct Earth's ancient climate.

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