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Spiral galaxies like Milky Way bigger than thought, says CU-Boulder study

By Guest PostJune 28, 2013Scienceboulder, brian keeney, casa, charles danforth, circumgalactic gas, cos, cos on hubble, cosmic origins spectrograph, diameter, galaxy evolution, higgs centre, Hubble Space Telescope, intergalactic interactions, james green, john stocke, light year, michael shull, Milky Way, missing link, scotland, spiral galaxy, supermassive black holes, theoretical physics, university of colorado, university of edinburgh

Let’s all fist bump: Spiral galaxies like our own Milky Way appear to be much larger and more massive than previously believed, according to a new University of Colorado Boulder study by researchers using the Hubble Space Telescope.

CU-Boulder Professor John Stocke, study leader, said new observations with Hubble’s $70 million Cosmic Origins Spectrograph, or COS, designed by CU-Boulder show that normal spiral galaxies are surrounded by halos of gas that can extend to over 1 million light-years in diameter. The current estimated diameter of the Milky Way, for example, is about 100,000 light-years. One light-year is roughly 6 trillion miles. (more…)

Cambrian Fossil Pushes Back Evolution of Complex Brains

By Guest PostOctober 10, 2012Nature, Scienceancient animal, arachnids, arizona, arthropods, brain anatomy, branchiopod brain, branchiopods, brine shrimp, cambrian fossil, cambrian period, China, common ancestor, complex brain, course, crustaceans, dna sequence, evolution, evolutionary biologist, fuxianhuia protensa, gregory edgecombe, hypothesis, insects, malacostracans, microscope, missing link, modern brain, modern malacostracan, molecular data, morphology, mudstone, multicellular animals, Nature, neural anatomy, neurobiologist, neurocladistics, neuropils, nicholas strausfeld, optic lobes, origin, sensory organ, species, taxonomic group, transformative discovery, university, xianguang hou, xiaoya ma, yunnan province, yunnan university. kunming

Complex brains evolved much earlier than previously thought, as evidenced by a 520-million-year-old fossilized arthropod with remarkably well-preserved brain structures.

The remarkably well-preserved fossil of an extinct arthropod shows that anatomically complex brains evolved earlier than previously thought and have changed little over the course of evolution. According to University of Arizona neurobiologist Nicholas Strausfeld, who co-authored the study describing the specimen, the fossil is the earliest known to show a brain.

The discovery will be published in the Oct. 11 issue of the journal Nature. (more…)

UCLA Scientists Discover ‘Missing Link’ Between Blood Stem Cells, Immune System

By Guest PostSeptember 5, 2012Health, Scienceblood, blood lineage, bone marrow, cell, diseases, gay crooks, gene, haystack, human, immune deficiency, immune function, immune system, infection, leukemia, lisa kohn, lymphocytes, missing link, needle, platelets, post natal life, progenitors, red blood cell, researcher, set, stem cell, type, ucla

UCLA researchers have discovered a type of cell that is the “missing link” between bone marrow stem cells and all the cells of the human immune system, a finding that will lead to a greater understanding of how a healthy immune system is produced and how disease can lead to poor immune function.

The research was done using human bone marrow, which contains all the stem cells that produce blood during post-natal life. (more…)

‘Time Machine’ Will Study the Early Universe

By Guest PostApril 14, 2012Scienceastronomer, big bang, black hole, brown dwarfs, caltech, charles steidel, cosmic dust, dark matter, david clarke, electromagnetic spectrum, era, families of galaxies, formation, Galaxy, gamma ray, gregory mace, harland epps, hawaii, ian s mclean, infrared camera, infrared wavelength, jupiter, keck i telescope, keith matthews, kristin kulas, lee a dubridge, mauna kea, milky way galaxy, missing link, mosfire, nirspec, radio wave, redshifted, sean adkins, spectrometer, time machine, ucla, universe, w m keck observatory

UCLA’s Ian McLean, colleagues build most advanced instrument of its kind

A new scientific instrument, a “time machine” of sorts, built by UCLA astronomers and colleagues, will allow scientists to study the earliest galaxies in the universe, which could never be studied before.

The five-ton instrument, the most advanced and sophisticated of its kind in the world, goes by the name MOSFIRE (Multi-Object Spectrometer for Infra-Red Exploration) and has been installed in the Keck I Telescope at the W.M. Keck Observatory atop Mauna Kea in Hawaii. (more…)

Tag Archives: missing link

Spiral galaxies like Milky Way bigger than thought, says CU-Boulder study

Cambrian Fossil Pushes Back Evolution of Complex Brains

UCLA Scientists Discover ‘Missing Link’ Between Blood Stem Cells, Immune System

‘Time Machine’ Will Study the Early Universe