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www.science.org/toc/science/193/4250
Science
•Volume 193|
•Issue 4250|
•23 Jul 1976
Female opossum (Didelphis virginiana) and young. At birth (after a 12-13-day gestation), the opossum is partially equivalent in development to a 4- to 6-week-old human embryo. Once nursing begins, voluntary detachment from the teat is not possible for about 70-90 days. The young pictured are in characteristic association with the mother just prior to weaning at 3 months of age. The opossum is the only marsupial indigenous to North America. See page 328. [Robert L. Blake, Duke University Medical Center]
Embryonal Neoplasms in the Opossum: A New Model for Solid Tumors of Infancy and Childhood
William Jurgelski, Jr., Pearlie M. Hudson, Hans L. Falk, and Paul KotinAuthors Info & Affiliations
Science
23 Jul 1976
Vol 193, Issue 4250
pp. 328-332
DOI: 10.1126/science.180602
Abstract
Opossums fed the chemical carcinogen ethyl nitrosourea early in postnatal life developed a variety of epithelial and mesenchymal embryonal neoplasms that were closely analogous, in morphology and biological behavior, to tumors of human infancy and childhood for which experimental models in laboratory animals are either imprecise or nonexistent. The embryonal tumors were found in association with, and occasionally at the same sites as, a limited number of malformations.
The More You Know 😊
Old houses. Escaldes, E-E, the center, Andorra city, Andorra, Pyrenees - (c) Lutz Meyer
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We offer 200.000+ photos of Andorra and North of Spain. 20.000+ visable here at Flickr. Its the largest professional image catalog of Andorra: all regions, all cities and villages, all times, all seasons, all weather(s). Consistent for additional advanced programming. For smartphones and web-db. REAL TIME!
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Old houses: Cami de la Font. Living in Engordany, E-E, the center, Andorra city, Andorra, Pyrenees - (c) Lutz Meyer
More Engordany, Escaldes-Engordany parroquia images: Follow the group links at right side.
.......
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* Half frame format 3x2 image
* Usage: Large format prints optional
* Motive is suitable as symbol pic
* "Andorra authentic" edition (20 years 2004-2026)
* "Andorra camis & rutes" active collection
* Advanced metadata functionality on dynamic websites or apps -
* for large metadata-controlled business collections: photo-archives, travel agencies, tourism editiorials
We offer 200.000+ photos of Andorra and North of Spain. 20.000+ visable here at Flickr. Its the largest professional image catalog of Andorra: all regions, all cities and villages, all times, all seasons, all weather(s). Consistent for additional advanced programming. For smartphones and web-db. REAL TIME!
It's based on GeoCoded stock-photo images and metadata with 4-5 languages. Prepared for easy systematic organising of large image portfolios with advanced online / print-publishing as "Culture-GIS" (Geographic Info System).
More information about usage, tips, how-to, conditions: www.flickr.com/people/lutzmeyer/. Get quality, data consistency, stable organisation and PR environments: Professional stockphotos for exciting stories - docu, tales, mystic.
Ask for licence! lutz(at)lutz-meyer.com
(c) Lutz Meyer, all rights reserved. Do not use this photo without license.
Old houses: Cami de la Font. Living in Engordany, E-E, the center, Andorra city, Andorra, Pyrenees - (c) Lutz Meyer
More Engordany, Escaldes-Engordany parroquia images: Follow the group links at right side.
.......
About this image:
* Half frame format 3x2 image
* Usage: Large format prints optional
* Motive is suitable as symbol pic
* "Andorra authentic" edition (20 years 2004-2026)
* "Andorra camis & rutes" active collection
* Advanced metadata functionality on dynamic websites or apps -
* for large metadata-controlled business collections: photo-archives, travel agencies, tourism editiorials
We offer 200.000+ photos of Andorra and North of Spain. 20.000+ visable here at Flickr. Its the largest professional image catalog of Andorra: all regions, all cities and villages, all times, all seasons, all weather(s). Consistent for additional advanced programming. For smartphones and web-db. REAL TIME!
It's based on GeoCoded stock-photo images and metadata with 4-5 languages. Prepared for easy systematic organising of large image portfolios with advanced online / print-publishing as "Culture-GIS" (Geographic Info System).
More information about usage, tips, how-to, conditions: www.flickr.com/people/lutzmeyer/. Get quality, data consistency, stable organisation and PR environments: Professional stockphotos for exciting stories - docu, tales, mystic.
Ask for licence! lutz(at)lutz-meyer.com
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Old houses: Carrer La Llacuna, Cap del Carrer, Andorra la Vella, Andorra-city, the center, Andorra, Pyrenees - (c) Lutz Meyer
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* "Andorra camis & rutes" active collection
* Advanced metadata functionality on dynamic websites or apps -
* for large metadata-controlled business collections: photo-archives, travel agencies, tourism editiorials
We offer 200.000+ photos of Andorra and North of Spain. 20.000+ visable here at Flickr. Its the largest professional image catalog of Andorra: all regions, all cities and villages, all times, all seasons, all weather(s). Consistent for additional advanced programming. For smartphones and web-db. REAL TIME!
It's based on GeoCoded stock-photo images and metadata with 4-5 languages. Prepared for easy systematic organising of large image portfolios with advanced online / print-publishing as "Culture-GIS" (Geographic Info System).
More information about usage, tips, how-to, conditions: www.flickr.com/people/lutzmeyer/. Get quality, data consistency, stable organisation and PR environments: Professional stockphotos for exciting stories - docu, tales, mystic.
Ask for licence! lutz(at)lutz-meyer.com
(c) Lutz Meyer, all rights reserved. Do not use this photo without license.
Gritty City Theatre Company production of "Paola Brown: The Town Crier of Hamilton" written by Melissa Murray-Mutch, directed by JR O'Handley, part of Hamilton Fringe Festival's Fringe on the Street July 26, 2026. Photos by Amanda Hinkle-Wallace.
Hamilton Fringe Festival: hftco.ca/events/paola-brown-the-town-crier-of-hamilton/
hftco.ca/performances/fringe-on-the-streets-outdoor-walki...
Gritty City Theatre Company IG: www.instagram.com/grittycitytheatre
Gritty City Theatre Company production of "Paola Brown: The Town Crier of Hamilton" written by Melissa Murray-Mutch, directed by JR O'Handley, part of Hamilton Fringe Festival's Fringe on the Street July 26, 2026. Photos by Amanda Hinkle-Wallace.
Hamilton Fringe Festival: hftco.ca/events/paola-brown-the-town-crier-of-hamilton/
hftco.ca/performances/fringe-on-the-streets-outdoor-walki...
Gritty City Theatre Company IG: www.instagram.com/grittycitytheatre
Gritty City Theatre Company production of "Paola Brown: The Town Crier of Hamilton" written by Melissa Murray-Mutch, directed by JR O'Handley, part of Hamilton Fringe Festival's Fringe on the Street July 26, 2026. Photos by Amanda Hinkle-Wallace.
Hamilton Fringe Festival: hftco.ca/events/paola-brown-the-town-crier-of-hamilton/
hftco.ca/performances/fringe-on-the-streets-outdoor-walki...
Gritty City Theatre Company IG: www.instagram.com/grittycitytheatre
Gritty City Theatre Company production of "Paola Brown: The Town Crier of Hamilton" written by Melissa Murray-Mutch, directed by JR O'Handley, part of Hamilton Fringe Festival's Fringe on the Street July 26, 2026. Photos by Amanda Hinkle-Wallace.
Hamilton Fringe Festival: hftco.ca/events/paola-brown-the-town-crier-of-hamilton/
hftco.ca/performances/fringe-on-the-streets-outdoor-walki...
Gritty City Theatre Company IG: www.instagram.com/grittycitytheatre