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A new study of Tiktaalik roseae (middle), a 375-million-year-old
transitional fossil, highlights an intermediate step between the condition
in fish like Eusthenopteron (bottom) and that in early limbed forms like
Acanthostega (top).
Credit: Univeristy of Chicago / Illustration by Kalliopi Monoyios |
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01/14/09 |
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| A representation of the 3D structure of the protein adenylate kinase (AK). Credit: Peter Nguyen |
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01/14/09 |
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Thermus thermophilus lives in very hot temperatures. The bacterium´ optimal growth temperature is about 65 degrees C (149 F).
Credit: Structural-Biological Whole Cell project (link http://www.thermus.org/ e_index.htm).
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01/14/09 |
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| Researchers will be studying the protein stability of Escherichia coli (seen in this scanning electron micrograph) at 40 degrees Celsius. Credit: Rocky Mountain Laboratories, NIAID, NIH. |
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01/14/09 |
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| Life may have originated at active hydrothermal vents where thermophiles would have thrived. Credit: New Zealand American Submarine Ring of Fire 2007 Exploration, NOAA Vents Program, the Institute of Geological & Nuclear Sciences and NOAA-OE. |
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| University of Utah geologist Winston Seiler walks among hundreds of potential dinosaur footprints in a "trample surface" that some researchers believe was a watering hole amid desert sand dunes during the Jurassic Period 190 million years ago. Credit:Roger Seiler/University of Utah |
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| This image shows what might be a Eubrontes dinosaur footprint. Dinosaur footprints are named by their shape because the species and genus of animal that made them isn't known, although Eubrontes tracks are believed to have been made by upright-walking, meat-eaters smaller than Tyrannosaurus rex. Credit: Winston Seiler/University of Utah |
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| Geologist Winston Seiler with some of the dinosaur tracks. The impressions once were thought to be potholes eroded by water. Now researchers have suggested that the impressions comprise a large dinosaur "trample surface" in northern Arizona. Credit: Nicole Miller/University of Utah |
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01/14/09 |
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| Ptomacanthus anglicus |
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05/27/09 |
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| bobtail |
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05/27/09 |
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| Federico Krause |
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05/27/09 |
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| Marine bivalves |
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05/27/09 |
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| Protein 3D |
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05/27/09 |
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| quartz with chlorite phantoms |
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05/27/09 |
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| primitive gene |
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05/27/09 |
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| Pilbara Craton WA |
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05/27/09 |
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| HF etching |
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05/27/09 |
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| siderite crystals |
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05/27/09 |
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| Penguins |
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05/27/09 |
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| bivalve morphologies |
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05/27/09 |
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| Tapichalaca |
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05/27/09 |
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| fossil fish |
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05/27/09 |
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| Eocene Green River Formation |
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05/27/09 |
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| carvone |
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05/27/09 |
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| Mammoth |
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05/27/09 |
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| E coli 10000x |
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05/27/09 |
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| elongation factor |
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05/27/09 |
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| Chicxulub sediments |
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05/27/09 |
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| Galapagos |
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05/27/09 |
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| Hadrosaurs |
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05/27/09 |
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| TreeofLife |
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06/07/09 |
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| Birdskeleton |
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06/09/09 |
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| EvoGrid 10 |
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07/01/09 |
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| EvoGrid 03 |
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07/01/09 |
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| EvoGrid 05 |
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07/01/09 |
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| EvoGrid 02 |
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07/01/09 |
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| carbonates |
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07/10/09 |
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| Dinosaurburrow |
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07/15/09 |
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| Dinoburrow2 |
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07/15/09 |
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| oryctodromeus |
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07/15/09 |
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| StrelleyPool |
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07/19/09 |
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| SouthChinaFossils |
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07/28/09 |
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| CrocFossil |
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08/04/09 |
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| cryptomartus |
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08/05/09 |
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| Eophrynus |
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08/05/09 |
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| Ediacara |
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08/21/09 |
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| Charnia |
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08/21/09 |
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| SemiPermeable |
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08/21/09 |
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| EoceneWyoming |
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08/22/09 |
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| Cliff_at_Stevns_Klint |
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10/02/09 |
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