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The oldest dinosaur-bearing fossil assemblage, the Ischigualasto Formation of Argentina, has been radiometrically dated back to 230.3 to 231.4 million years ago. This age is very similar to the minimum age calculated for the CPE (≈230.9 million years ago).
Genetic analysis indicates that the ancestors of the modern species of lutung first differentiated from one another a little over 3 million years ago, during the late Pliocene. The various species alive today then diverged during the Pleistocene , presumably driven by habitat changes during the Ice Ages . [ 7 ]
Estimates of its age range from 347 [1] million to 550 [3] million years. It has 1,500 [2] times the mass of the Sun (M ☉) and contains over 500 identified stars, [3] with roughly 150 stars brighter than magnitude 12.5. M37 has at least a dozen red giants and its hottest surviving main sequence star is of stellar classification B9 V.
Archaeopteris is an extinct genus of progymnosperm tree with fern-like leaves. A useful index fossil , this tree is found in strata dating from the Upper Devonian to Lower Carboniferous ( 382 to 323 million years ago ), the oldest fossils being 385 million years old, [ 1 ] and had global distribution.
The earliest evidence for life on Earth includes: 3.8 billion-year-old biogenic hematite in a banded iron formation of the Nuvvuagittuq Greenstone Belt in Canada; [30] graphite in 3.7 billion-year-old metasedimentary rocks in western Greenland; [31] and microbial mat fossils in 3.48 billion-year-old sandstone in Western Australia. [32] [33 ...
Mega El Niños could have intensified the world’s most devastating mass extinction, which ended the Permian Period 252 million years ago, a new study found. The Great Dying once wiped out 90% of ...
Scientists discovered a 520-million-year-old fossilized larva with brains and guts intact, offering unprecedented insights into early arthropod evolution.
The shift towards postcanine megadontia dates back to about 4-5 million years ago with the discovery of Ardipithecus ramidus in the Middle Awash region of Ethiopia. [6] Distinctive features in A. ramidus such as dentition with reduced canines, the skull, hindlimb and forelimb suggest it to be near the split between the chimpanzee and hominin ...