The Allegheny Plateau is like an enormous sheet of crumpled paper.
That’s the Ohio River on the left in this relief map of southwest Pennsylvania and northern West Virginia. The image is from the current issue of Science Magazine, in which researchers reported a model that predicts how river networks evolve over long time spans:
…channels, basins and watersheds generally migrate in order to achieve a state of equilibrium, under which the landscape stops shifting. Tributaries into the Yellow River in China, for example, appear to have become relatively stationary by now, they say. But, the young topography of central Taiwan and the ancient river network of the southeastern United States are each still in flux, according to the researchers. This new way of looking at river systems..may yield some valuable insights about the biophysical drivers of evolution with implications for ecology and conservation in the future. [Dynamic Reorganization of River Basins, Science (2014)]
Image credit: Taylor Perron via Science Magazine
Eee! Io, eh?
Top: A volcano erupting on Io, one of the moons of Jupiter. The volcanic plume is 200 miles high.
Bottom left: Lava spilling onto the surface of Io.
Bottom right: Collapsed volcanoes on Io.
Images made by NASA’s New Horizons spacecraft via Goddard Space Flight Center
Venus is bright. Even light pollution can’t diminish it.
Photo: Christy Sanchez, in Denver, Colorado — February 26, 2014.
Via March 2014 guide to the five visible planets | EarthSky
Venus beams in the eastern predawn and dawn sky throughout March. At mid-northern latitudes, it rises about two and one-half hours before sunrise in early March and about two hours before sunup by the month’s end.
Venus will continue to shine as the “morning star” until late September or early October 2014.
Harpea’s Cave. Navarra, Spain.
False color representation of protein expression in human breast tumor biopsies:
An imaging method that lets you simultaneously visualize up to 100 different proteins expressed in tumor tissue sections using secondary ion mass spectrometry to image antibodies tagged with metal isotopes. The inventors call it multiplexed ion beam imaging (MIBI):
…we expect that reagents can be developed that will extend the capability of MIBI beyond antibody-based analysis to other arenas, such as in situ hybridization and subcellular metabolic analysis…The basic science utility of such a system is evident, and clinical deployment of this technology would extend multiplexed expression analysis typically restricted to flow cytometry of cell suspensions (such as blood) to any solid tissue…Given the transformative effect that flow cytometry has shown in the diagnosis, staging and treatment of hematopoietic malignancies, the present approach, when applied to solid tissue samples, could provide new insight into disease pathogenesis, address pathway activation status, explore tumor heterogeneity and document effects of therapeutic interventions that could ultimately improve patient outcomes. (Nature Medicine, Mar 2, 2014)
Image: Mike Angelo
Post-Apocalyptic images of Japan Source
February 28, 2014 at 12:47pm
Kids’ images of scientists before and after meeting some real ones at Fermilab.
Nuclear explosions photographed milliseconds after detonation by means of rapatronic cameras:
The camera was developed by Harold Edgerton in the 1940s and was first used to photograph the rapidly changing matter in nuclear explosions within milliseconds of ignition.
For a film-like sequence of high-speed photographs, as used in the photography of nuclear and thermonuclear tests, arrays of up to 12 cameras were deployed, with each camera carefully timed to record a different time frame. Each camera was capable of recording only one exposure on a single sheet of film. Therefore, in order to create time-lapse sequences, banks of four to ten cameras were set up to take photos in rapid succession. The average exposure time used was three microseconds.
Yes, Netflix has been slower on these cable providers
Have Verizon, Comcast, or AT&T Internet? Then you might have noticed something about your Netflix account lately: the quality sucks.
In a major move by huge corporations and a blow to consumers, Netflix has agreed to pay Comcast for direct access to its broadband network. The deal was likely made after the Internet provider (as well as others) either deliberately throttled network speeds for its high-bandwidth content or simply neglected to upgrade aging telecommunications infrastructure until a backlog was inevitable. The deal likely marks the end of an era in which major telecommunications companies were largely expected to treat the data going over their cables exactly the same, regardless of its source. In other words, net neutrality is dead.
Read more | Follow policymic
February 25, 2014 at 11:24pm
Epiphytic ferns cascade from the high boughs of this estimable American elm in Portland, Ore.