Read More: NASA is once again \u201cflying around the Moon\u201d with four astronauts and a 10-day mission, the first dress rehearsal since 1972, putting Artemis III in the spotlight<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\nBoth records show an overall rise through the Phanerozoic, along with a major shared surge between roughly 330 and 220 million years ago, when oxygen may have reached about 35% of the atmosphere compared with about 21% today. The statistical link is strong, with a correlation of about 0.7 on a scale where one would be a perfect match. <\/p>\n\n\n\n
\u201cThese two datasets are very similar\u201d said lead author Weijia Kuang in a NASA summary of the work. He noted that Earth is the only known planet that supports complex life and a long\u2011lived internal magnetic field, so seeing the two evolve together could be a key clue to how habitability is maintained over deep time<\/a>.<\/p>\n\n\n\nAncient rocks as an environmental archive<\/h2>\n\n\n\n
How do we even know what the magnetic field or oxygen looked like hundreds of millions of years ago? The answer sits quietly in old rocks. When molten material cools, tiny magnetic minerals inside lock in the direction and strength of the field that surrounded them, like microscopic compass needles frozen in place.<\/p>\n\n\n\n
Oxygen levels, in turn, can be inferred from several independent proxies. Charcoal in sediments tells scientists when wildfires were common. Ratios of carbon and sulfur in rocks record how much organic matter was buried or oxidized. <\/p>\n\n\n\n
Together, these records map a long, if imperfect, history of atmospheric oxygen<\/a> through the eras, from the Cambrian explosion of diverse animals to the rise and breakup of supercontinents.<\/p>\n\n\n\nA shared engine inside the planet<\/h2>\n\n\n\n
At first glance, it might seem obvious to credit the magnetic field<\/a> itself. A stronger field can deflect more charged particles from the Sun, which should help shield the atmosphere from erosion. Yet the numbers do not really add up. <\/p>\n\n\n\nCalculations in the new paper indicate that oxygen loss to space is tiny compared with the huge oxygen exchanges driven by volcanism, weathering, and the global carbon cycle.<\/p>\n\n\n\n
So the authors lean toward a different picture. Both oxygen and magnetic intensity may be responding to the same deep\u2011Earth processes. When tectonic plates assemble into supercontinents like Pangea and later break apart, they rearrange heat flow at the boundary between the rocky mantle and the liquid metal core. <\/p>\n\n\n\n![\"A](\"https:\/\/www.ecoticias.com\/en\/wp-content\/uploads\/2026\/04\/nasa-earth-magnetic-shield-oxygen-levels-link-1.jpg\" "\\"\\"")
NASA researchers have found a strong statistical correlation between the intensity of Earth’s magnetic field and atmospheric oxygen levels over the last 540 million years.<\/figcaption><\/figure>\n\n\n\nThat can alter convection in the core that powers the geodynamo while also changing volcanic degassing and weathering at the surface, which shape the long\u2011term oxygen budget.<\/p>\n\n\n\n
Biogeochemist Benjamin J. W. Mills, a co-author based at University of Leeds, suggested that magnetic strength and oxygen may both be \u201cresponding to a single underlying process, such as the movement of Earth\u2019s continents.\u201d <\/p>\n\n\n\n
\n\n\nRead More: NASA detects a strange \u201cred pulse\u201d on a Norwegian glacier, and what happens every summer in Svalbard is leaving many people speechless<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\nIn practical terms, that means plate tectonics might be tuning both the shield that protects our atmosphere and the chemistry of the air itself.<\/p>\n\n\n\n
Clues for worlds beyond our own<\/h2>\n\n\n\n
For exoplanet hunters<\/a>, this quiet rhythm in our own planet\u2019s history could be a game changer. Earth is, so far, the only rocky world known to combine an oxygen\u2011rich atmosphere with a robust internal magnetic field. <\/p>\n\n\n\nIf the two are linked over geological timescales, then simply finding a planet in the right temperature zone around its star may not be enough. Its interior and magnetic behavior might matter just as much.<\/p>\n\n\n\n
Researchers in projects like the Sellers Exoplanet Environments Collaboration, which includes coauthor Ravi Kopparapu, already study how stellar flares and magnetic shielding shape planetary climates. <\/p>\n\n\n\n
This new work hints that the deep interior also needs a spot on the checklist when we talk about habitability on distant worlds.<\/p>\n\n\n\n
Many questions still open<\/h2>\n\n\n\n
The study does not claim that magnetism alone controls oxygen or that life on Earth was somehow pre\u2011planned. <\/p>\n\n\n\n
Instead, it highlights a long\u2011term pattern that current models do not fully explain. Co-author Joshua Krissansen-Totton and colleagues emphasize that higher\u2011resolution records and better simulations will be needed before scientists can pin down the exact mechanisms.<\/p>\n\n\n\n
\n\n\nRead More: Ancient DNA reveals that hunter-gatherers in what is now Belgium and the Netherlands survived until 2500 BC, when the rest of Europe was already engaged in agriculture<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\nAs Kopparapu put it, \u201cThere\u2019s more work to be done to figure that out.\u201d Future studies will look at other key elements such as nitrogen and try to extend both magnetic and oxygen records farther back in time. For now, the message is simple enough to carry into everyday life. <\/p>\n\n\n\n
The breathable air that fills our lungs and the invisible field that steers compasses and paints auroras in the night sky may be two faces of the same slow, planetary heartbeat.<\/p>\n\n\n\n
The study was published in Science Advances<\/em><\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"Take a breath and imagine the invisible forces that made that gulp of oxygen possible. A new study led by … <\/p>\n
Ancient rocks as an environmental archive<\/h2>\n\n\n\n
How do we even know what the magnetic field or oxygen looked like hundreds of millions of years ago? The answer sits quietly in old rocks. When molten material cools, tiny magnetic minerals inside lock in the direction and strength of the field that surrounded them, like microscopic compass needles frozen in place.<\/p>\n\n\n\n
Oxygen levels, in turn, can be inferred from several independent proxies. Charcoal in sediments tells scientists when wildfires were common. Ratios of carbon and sulfur in rocks record how much organic matter was buried or oxidized. <\/p>\n\n\n\n
Together, these records map a long, if imperfect, history of atmospheric oxygen<\/a> through the eras, from the Cambrian explosion of diverse animals to the rise and breakup of supercontinents.<\/p>\n\n\n\n At first glance, it might seem obvious to credit the magnetic field<\/a> itself. A stronger field can deflect more charged particles from the Sun, which should help shield the atmosphere from erosion. Yet the numbers do not really add up. <\/p>\n\n\n\n Calculations in the new paper indicate that oxygen loss to space is tiny compared with the huge oxygen exchanges driven by volcanism, weathering, and the global carbon cycle.<\/p>\n\n\n\n So the authors lean toward a different picture. Both oxygen and magnetic intensity may be responding to the same deep\u2011Earth processes. When tectonic plates assemble into supercontinents like Pangea and later break apart, they rearrange heat flow at the boundary between the rocky mantle and the liquid metal core. <\/p>\n\n\n\n That can alter convection in the core that powers the geodynamo while also changing volcanic degassing and weathering at the surface, which shape the long\u2011term oxygen budget.<\/p>\n\n\n\n Biogeochemist Benjamin J. W. Mills, a co-author based at University of Leeds, suggested that magnetic strength and oxygen may both be \u201cresponding to a single underlying process, such as the movement of Earth\u2019s continents.\u201d <\/p>\n\n\n\n In practical terms, that means plate tectonics might be tuning both the shield that protects our atmosphere and the chemistry of the air itself.<\/p>\n\n\n\n For exoplanet hunters<\/a>, this quiet rhythm in our own planet\u2019s history could be a game changer. Earth is, so far, the only rocky world known to combine an oxygen\u2011rich atmosphere with a robust internal magnetic field. <\/p>\n\n\n\n If the two are linked over geological timescales, then simply finding a planet in the right temperature zone around its star may not be enough. Its interior and magnetic behavior might matter just as much.<\/p>\n\n\n\n Researchers in projects like the Sellers Exoplanet Environments Collaboration, which includes coauthor Ravi Kopparapu, already study how stellar flares and magnetic shielding shape planetary climates. <\/p>\n\n\n\n This new work hints that the deep interior also needs a spot on the checklist when we talk about habitability on distant worlds.<\/p>\n\n\n\n The study does not claim that magnetism alone controls oxygen or that life on Earth was somehow pre\u2011planned. <\/p>\n\n\n\n Instead, it highlights a long\u2011term pattern that current models do not fully explain. Co-author Joshua Krissansen-Totton and colleagues emphasize that higher\u2011resolution records and better simulations will be needed before scientists can pin down the exact mechanisms.<\/p>\n\n\n\n As Kopparapu put it, \u201cThere\u2019s more work to be done to figure that out.\u201d Future studies will look at other key elements such as nitrogen and try to extend both magnetic and oxygen records farther back in time. For now, the message is simple enough to carry into everyday life. <\/p>\n\n\n\n The breathable air that fills our lungs and the invisible field that steers compasses and paints auroras in the night sky may be two faces of the same slow, planetary heartbeat.<\/p>\n\n\n\n The study was published in Science Advances<\/em><\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":" Take a breath and imagine the invisible forces that made that gulp of oxygen possible. A new study led by … <\/p>\nA shared engine inside the planet<\/h2>\n\n\n\n
Read More: NASA detects a strange \u201cred pulse\u201d on a Norwegian glacier, and what happens every summer in Svalbard is leaving many people speechless<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n
Clues for worlds beyond our own<\/h2>\n\n\n\n
Many questions still open<\/h2>\n\n\n\n
Read More: Ancient DNA reveals that hunter-gatherers in what is now Belgium and the Netherlands survived until 2500 BC, when the rest of Europe was already engaged in agriculture<\/a><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n