"First scorpions may have crawled from the seas" Topic
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Tango01 | 16 Jan 2015 9:58 p.m. PST |
"The origins of scorpions are murky. The oldest of these arachnids (a group that also includes modern-day spiders, ticks, and mites) are known from fossils from Scottish rocks laid down between 433 million and 438 million years ago that show only their outlines. Now, well-preserved but slightly younger fossils from southwestern Ontario suggest that the animals originated in the seas—and may have been able to clamber onto shore well before the time scientists previously recognized. Those fossils—11 specimens in all—were entombed in sediments laid down on the shores of ancient lagoons between 430 million and 433 million years ago. And because all of them are of molted exoskeletons and not carcasses, the remains were too fragile to be washed to their final resting place from somewhere else, researchers suggest…" Full article here link Amicalement Armand |
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