For centuries, Earth has been popularly known as the ‘Blue Planet,’ a moniker inspired by the vast oceans that cover about three-quarters of its surface. However, a new study published in Nature Geology & Evolution suggests that this familiar blue appearance might not have always been the case.
According to researchers, during certain periods in Earth’s distant past, the oceans may have exhibited a green hue. This transformation could have been due to various factors, including different chemical compositions, the presence of ancient microbial life, or shifts in atmospheric and oceanic conditions. Such changes would have affected the way sunlight interacted with the water, influencing its color.
The findings offer a new perspective on Earth’s early environment and may help scientists better understand the planet’s geological history and the evolution of life. Further research is expected to explore the specific conditions that could have contributed to these dramatic changes in ocean coloration.
This study invites a reconsideration of long-standing assumptions about Earth’s appearance and highlights the dynamic nature of its environmental history.
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