A tiny fossil, Acronichthys maccognoi, rewrites fish evolution in North America and reveals how otophysans conquered freshwater habitats.
The findings show that the common ancestor of the extant fungi was about 1.4 to 900 million years ago. That is far earlier ...
From the mist-shrouded cliffs of the Pacific Coast to the wind-whipped peaks of Pikes Peak, America’s highways double as open ...
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