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Dean Calahan
Works at Smithsonian Institution
Attended Johns Hopkins: Ph.D. Biology
Lives in Chesapeake Region
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Dean Calahan

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A striking illustration of some copepods. Some copepods are algae grazers.

https://en.wikipedia.org/wiki/Copepod
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Dean Calahan

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Future Stone age cyberpunk? Paleopunk?
 
Keepalive is Aram Bartholl’s fake hollow boulder in the woods of Neuenkirchen, Germany. It conceals a thermoelectric generator that powers a router configured to serve documents related to wi…
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Caching has a whole new meaning.
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They had been running with helium. Now they're cooking with gas!
 
The fusion reactor designed in hell fires up a little hydrogen-based hell of its own: 
Hydrogen plasma was produced for the first time in the Wendelstein 7-X fusion device, which has been called the "pretzel that could save Planet Earth."
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BEAM is a small test volume that will be installed on ISS. It is an inflatable module whose descendants/cousins have the potential to enable much larger space habitats.
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21 6 ft y y m. .gvy.
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A kind of algae. Algae is not a taxon, but rather a highly polyphyletic morphological assemblage.
 
Music From the Bottom of the Food Chain

Dinoflagellates are at or near the bottom of the food chain. Pretty much anything you eat that comes out of the ocean either eats them or eats something that eats them. So while they’re really important because they are food for life in the ocean, since they’re microscopic, they’re usually underappreciated. So, a musical group of humans called Higher Mammals have dedicated an entire 2-hour show to dinoflagellates. And there’s a little bit of that that I wanted to share with you guys.

Check it out in The Daily Catch: http://theterramarproject.org/thedailycatch/music-from-the-bottom-of-the-food-chain/

Photo: David Patterson and Bob Anderson (CC BY-NC 2.0)

#nature #wildlife #FoodChain #FoodWeb
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How would you like your jellyfish prepared?
 
A deep red medusa jellyfish found just off the bottom of the deep sea.

Crossota is a genus of jellyfish of the family Rhopalonematidae. The genus comprises five species. Unlike most hydromedusae, these jellyfish do not have a sessile stage. Rather, they spend their entire lives in the water column as plankton. The genus Crossota is widespread throughout the oceans.

Image courtesy of Kevin Raskoff, California State University, Monterey Bay.

#nature #ocean #wildlife
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Very Interesting! These creatures are amazing ! Thanks 4sharing 
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It invariably stresses me out more an more until a space mission actually gets to its desired orbit or trajectory.
 
NASA GODDARD SPACE FLIGHT CENTER, MD - All 18 of the primary mirrors have been fully installed onto the flight structure of what will become the biggest and most powerful space telescope ever built by humankind - NASA’s James Webb Space Telescope (JWST).
NASA GODDARD SPACE FLIGHT CENTER, MD - All 18 of the primary mirrors have been fully installed onto the flight structure of what will become the biggest and most powerful space telescope ever built by humankind - NASA’s James Webb Space Telescope (JWST).
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Just the one. Hope it won't need repairs. Still nearly three years to wait.
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Global paleogeographical dispersal model:

https://figshare.com/articles/Global_paleogeographical_dispersal_model/1565669 

Global paleogeographical dispersal model for 25 areas and 26 epochs. Areas are marked by black vertices. Black edges indicate both short- and medium distance dispersal routes. White edges indicate exclusively medium distance dispersal routes. Long distance dispersal routes are not shown, but are implied to exist between all area-pairs.

#Computational #Evolutionary #Biology #Geology
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As Rosetta's comet zooms back out into deeper space…
 
Comet 67P/Churyumov–Gerasimenko Jan. 30 Narrow Angle View

In this image taken January 30, 2016 by the OSIRIS (Optical, Spectroscopic, and Infrared Remote Imaging System, http://goo.gl/FRHgXH) Narrow Angle Camera aboard the Rosetta spacecraft using a 649 nm filter (orange) you can see a part of Comet 67P/Churyumov–Gerasimenko.

Image scale is 1.11 meters/pixel. Distance between Rosetta and comet 67P was 61.860 kilometers.

I edited the image to show more detail and get more contrast.

The original image can be found here:
https://planetgate.mps.mpg.de:8114/Image_of_the_Day/public/OSIRIS_IofD_2016-02-03.html

More on the Rosetta spacecraft:
http://blogs.esa.int/rosetta/
http://rosetta.esa.int/
https://en.wikipedia.org/wiki/Rosetta_(spacecraft)

More on Comet 67P/Churyumov–Gerasimenko:
https://en.wikipedia.org/wiki/67P/Churyumov%E2%80%93Gerasimenko
http://sci.esa.int/rosetta/14615-comet-67p/

Image credit: ESA/Rosetta/MPS for OSIRIS Team MPS / UPD / LAM / IAA / SSO / INTA / UPM / DASP / IDA / Edited by +Pierre Markuse 

#science   #rosetta   #comet67p   #space   #spaceexploration   #esa   #comet   #osiris   #solarsystem #spacetechnology 
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How many of these do you have because they r awesome 
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Obviously we shall have to build an overwhelmingly large collider in the future.
 
An anomaly in data from particle collisions in the Large Hadron Collider has researchers scratching their heads. Is this evidence of new particles that could turn the Standard Model of Physics on its head?
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Gotta hack the sim.
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This is a classic debugging process.
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Wow! It is so cool so you said it is a process , so far it looks good
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Dean's Collections
People
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Education
  • Johns Hopkins: Ph.D. Biology
  • Towson University: B.S. Molecular Biology, Biochemistry, & Bioinformatics
Links
Story
Tagline
Genes, Cells, Informatics, …Algae!
Introduction
Willamette brewed, Puget aged, Chesapeake tapped.

I love reading what you post directly. However, I don't want to see what you've +1'd. Also, please try using Collections for your food and cat pictures.

Have a nice day!
Bragging rights
Walked around Mount Rainier in nine days. Hiked the entire Olympic National Park wilderness coast. Did 4-season camping for many years (Christmas at Panorama Point, Mt. Rainier; Cape Alava, Olympic Coast, in 70 mph winds; etc.).
Work
Occupation
Algae farmer
Skills
Cell & molecular biology, genetics, bioinformatics, software engineering, making things happen
Employment
  • Smithsonian Institution
    Researcher/Fellow, 2013 - present
  • Johns Hopkins
    Ph.D. Biology, 2004 - 2011
  • Towson University
    B.S. Molecular Biology, Biochemistry, and Bioinformatics, 2002 - 2004
  • Microsoft
    SDE/T, 1993 - 2000
  • Aldus
    Test lead, 1987 - 1992
  • Timeline
    Mainframe operator, 1983 - 1986
  • University of Washington
    Chemistry, 1981 - 1985
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Chesapeake Region
Previously
Puget Sound Region - Mid-Willamette Valley
Dean Calahan's +1's are the things they like, agree with, or want to recommend.