Author: Alvaro Arrizabalaga received a BA in History (Vitoria, 1988) and a Master in CRM -Archaeology option- (Vitoria, 1992) at the University of the Basque Country (Spain). He finished his PhD in Prehistory ( La industria lítica del Paleolítico superior inicial en el oriente cantábrico ) in 1995. He has been a lecturer of Prehistory […]
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Plant that consumes nickel found in the Philippines A plant that thrives in nickel-rich dirt has been discovered in the Philippines. Rinorea niccolifera can absorb large amounts of nickel through its leaves. UPI Regrown bone in monkeys using pluripotent stem cells It could be possible to grow new bone in humans using induced pluripotent stem […]
The SN2 reaction is one of the most important processes in organic chemistry and has been the subject of numerous experimental and theoretical investigations . The designation SN2 stands for substitution nucleophilic bimolecular. The reaction’s equation, X + R-Y → X-R + Y, summarizes bond formation by the attacking nucleophile X with the moiety R […]
Imagine you are the owner of a hot dog stand and, after many stressful years in the streets of New York City, you are moving the business to the countryside. Of course, you want all the potential users to have your stand as close as possible. After thinking on it for a while, you take […]
Of all the advances made in theoretical physics in the last twenty years, I still have no doubt that the most impressive one is the so called Maldacena’s conjecture, the guess that the physics involved in some models of quantum gravity living in a very concrete 5-dimensional spacetime has a one-to-one correspondence with the physics […]
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Turtles more closely related to crocodiles and birds than snakes and lizards The murky evolutionary history of the turtle has been made a little clearer by researchers using new microRNA data which link the shelled reptiles more closely with birds and crocodiles than to lizards and snakes. Yale University Universe’s evolution recreated in computer simulation […]
Think on a cell, it is alive and, among other things, it lives to reproduce itself. The paradigm of cell division is the mitosis, a wonderful dance orchestrated to equitably distribute the possessions of the mother cell: molecular structures, machinery and, especially, the genetic material. Prior to distribute, a good mother always amasses a fortune […]
Amongst the many things science is useful for, explanation stands within the top. We use scientific knowledge to describe the world, to map it, to predict it, and to guide our actions thanks to the predictions about the consequences of our actions, but we also want science to provide us explanations, to help us understand […]
Comets are one of the key components of our Solar System, at least for the Earth’s evolution and humankind point of view. While the inner region of our system was depleted in volatiles due to the high temperatures close to the Sun, the left overs in the outer borders retained water and other condensables in […]
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Wet sand may have helped ancient Egyptians move massive stones Ancient Egyptians dampened the sand to move the 2.5-ton stones used to build the pyramids to prevent berming and halve the amount of force needed to drag the sled, researchers say. The wet sand reduced the friction, making the sledge easier to move. Scientists at […]