A recent study published in Science unveils a detailed curve of global mean surface temperatures that highlights Earth’s temperature fluctuations over the Phanerozoic Eon, a period when life diversified and survived multiple mass extinctions. The research offers a clearer picture of how global temperatures have changed over time, emphasizing the strong relationship between Earth’s temperature and atmospheric carbon dioxide levels. The Phanerozoic Eon began around 540 million years ago, marked by the Cambrian Explosion—a time when complex, hard-shelled organisms first appeared. While simulation…