From time to time, there have been long periods of cooling in Earth’s history. Temperatures had already fallen for more than ten million years before the last ice age began about 2.5 million years ago. At that time the northern hemisphere was covered with massive ice masses and glaciers.
Zermatt in the Western Alps [Credit: F. von Blanckenburg]A geoscientific paradigm, widespread for over twenty years, explains this cooling with the…
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