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Doubt cast on global firestorm generated by dino-killing asteroid

By Guest PostJanuary 24, 2015Scienceancient pigment, eco friendly vehicle, egyptian blue, extinction of dinosaurs, extinction of species, global firestorm, hydrogen fuel cell, lance gande, life, mass extinction, million years ago, theory, university of exeter

Pioneering new research has debunked the theory that the asteroid that is thought to have led to the extinction of dinosaurs also caused vast global firestorms that ravaged planet Earth.

A team of researchers from the University of Exeter, University of Edinburgh and Imperial College London recreated the immense energy released from an extra-terrestrial collision with Earth that occurred around the time that dinosaurs became extinct. They found that the intense but short-lived heat near the impact site could not have ignited live plants, challenging the idea that the impact led to global firestorms. (more…)

Scientists Find Possible Solution to an Ancient Enigma

By Guest PostJune 20, 2013Environmentamoeba, ancient enigma, anna mcintyre wressnig, calcium carbonate, cat scans, ciliates, clotted stones, coastal sediment, colchicine, disappearance, earth history, evolution, extinction of dinosaurs, foraminifera, geobiologist, highborne cay, hypotheses, joan bernhard, layered rocks, life on earth, meteorite, microbes, microbial ecologist, microfabric, minerals, multicellular life, oceanic sediments, paleontologists, photosynthetic cyanobacteria, proterozoic eon, protozoa, remote valleys, rrna, scientists, sediment, solution, stromatolites, thecate, thrombolites, velociraptors, virginia edgcomb, whoi

The widespread disappearance of stromatolites, the earliest visible manifestation of life on Earth, may have been driven by single-celled organisms called foraminifera.

The findings, by scientists at Woods Hole Oceanographic Institution (WHOI); Massachusetts Institute of Technology; the University of Connecticut; Harvard Medical School; and Beth Israel Deaconess Medical Center, Boston, were published online the week of May 27 in the Proceedings of the National Academy of Sciences. (more…)

Mammals Grew 1,000 Times Larger After the Demise of the Dinosaurs

By Guest PostNovember 27, 2010Scienceafrican elephant, body size patterns, deinotherium, dinosaurs, early pleistocene, eocene, Epoch, evolution of body size, extinction of dinosaurs, felisa smith, indricotherium, late-miocene, mammals, oligocene, saran twombly, united states, university of new mexico

*NSF enabled the assembly of an international, interdisciplinary team that was the first to quantitatively document body size patterns over the past 100 million years*

Researchers have demonstrated that the extinction of dinosaurs some 65 million years ago paved the way for mammals to get bigger, about a thousand times larger than they had been when dinosaurs roamed the earth. The study, released in the journal Science, is the first to quantitatively document the patterns of body size of mammals after the existence of dinosaurs.

About the Image: The largest land mammals that ever lived, Indricotherium and Deinotherium, would have towered over the living African Elephant. Indricotherium lived during the Eocene to the Oligocene Epoch (37 to 23 million years ago) and reached a mass of 15,000 kg, while Deinotherium was around from the late-Miocene until the early Pleistocene (8.5 to 2.7 million years ago) and weighed as much as 17,000 kg. Image credit: NSF RCN IMPPS (more…)

Tag Archives: extinction of dinosaurs

Doubt cast on global firestorm generated by dino-killing asteroid

Scientists Find Possible Solution to an Ancient Enigma

Mammals Grew 1,000 Times Larger After the Demise of the Dinosaurs