- Who Were The First Organisms To Live On Land? - Popular Science
The conventional viewpoint is that the first terrestrial life migrated out of the water about 430 million years ago, in the midst of a period known as the “Cambrian Explosion of Life”–an
- Beginnings: Life on Our World and Others - NASA Science
The team probes how Earth might have looked to a distant observer at various points in its 4 5-billion-year existence “Earth is the only planet we know of with life,” Lyons said “But Earth has been many different planets over its history Those are the alternative Earths ”
- Interactive map could reveal world’s undiscovered species . . .
A new interactive map can predict where as-yet-undiscovered species might be found Scientists analyzed 32,000 existing species to predict where we might find the next ones Finding new species is the key to protecting them Around 40% of the world’s economy is thought to be contingent on biodiversity
- Zeroing in on the origins of Earth’s “single most important . . .
Fournier ran this model to estimate the age of the “crown” group of cyanobacteria, which encompasses all the species living today and known to exhibit oxygenic photosynthesis They found that, during the Archean eon, the crown group originated around 2 9 billion years ago, while cyanobacteria as a whole branched off from other bacteria
- Precambrian - Wikipedia
Relatively little is known about the Precambrian, despite it making up roughly seven-eighths of the Earth's history, and what is known has largely been discovered from the 1960s onwards The Precambrian fossil record is poorer than that of the succeeding Phanerozoic , and fossils from the Precambrian (e g stromatolites ) are of limited
- Amazon wildlife | WWF
To date, at least 40,000 plant species, 427 mammals (e g jaguar, anteater and giant otter), 1,300 birds (e g harpy eagle, toucan and hoatzin), 378 reptiles (e g boa), more than 400 amphibians (e g dart poison frog) and around 3,000 freshwater fishes 1 including the piranha have been found in the Amazon
- Geochemistry of organic-rich black shales from the Ediacaran . . .
The Ediacaran Period (635-541 million years ago) is considered as one of the most critical and controversial in Earth’s geological history It witnessed major evolutionary and environmental transitions, including shifts in continental configuration, oceanic conditions, atmospheric oxygenation, isotopic patterns, global glaciation, and biogeochemical cycling (Knoll, 1992, Knoll, 2001; Knoll
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