Our planet’s first known mass extinction happened about 440 million years ago. Species diversity on Earth had been increasing over a period of roughly 30 million years, but that would come to a halt ...

Imagine swimming in the ocean, the salty water swirling around you, when a shadow glides silently beneath the surface. That ...

Palaeoceanography is the study of past changes in ocean conditions including temperature ... most important ecosystemic stressor during the Devonian-Carboniferous mass extinction, in contrast ...

The idea that extreme heat could one day cause a mass extinction and end the dominance of humans is not as farfetched as it ...

Diversity increased progressively through the Palaeozoic, and in the Devonian forms started to appear with massive ... possibly triggered by ever rising levels of ocean productivity. Echinoids ...

With the establishment of ocean and atmosphere ... Carboniferous 340 million.years. Devonian 370” Ordovician 430” Algonkian 1,000 a -i j 1,000 Archrnan ^ (1,630 We must not moan over the ...

tMrica 16, 183, 1005; Sues, Devonian and Carboniferous rocks is fairly ... much as in later times. Crust, ocean, and atmosphere had by the opening of the Archeozoic already attained a condition ...

This period, known as the Devonian, was a time of prolific marine life ... The evidence for this prehistoric ocean is primarily embedded in Arizona’s sedimentary rocks. These layers, laden with marine ...

However, live specimens have shown that these fish have survived in deep ocean habitats, maintaining nearly the exact form as their distant ancestors from the Devonian Period. Marjorie ...