Dead Whale Found in the Amazon Jungle

  • The carcass which is 8-meter long was found near the mouth of the Amazon river on February 2019.
  • No wounds has been found anywhere on the body, but there were few clues to explain how this creature ended up so far from the water.
  • Specialist still not sure how it ended there, but we’re speculating that the creature was floating too close to the shore and the tide picked it up and slammed it inland into the mangrove.
  • Not only was the whale found remarkably far from shore, it was also found in the exact opposite season you’d expect to see humpbacks in this region.
  • This humpback was found near the mouth of the Amazon River, some 4,000 miles from its expected feeding grounds, a baffling discovery that has stumped the scientists who found it.
  • Looking at the size of the carcass, biologists think the whale is probably a juvenile less than one year old.
  • Biologists suspect that the baby whale somehow lost its mother during migration, and that’s why it was left behind in the Amazon basin.
  • Another theory is that the baby whale died from ingesting plastic waste and its dead body was washed ashore during a storm.
  • The rising humpback population has also increased the odds that one will become entangled in fishing nets or be struck by a ship, believed to be leading causes of their deaths.

Sources:

https://www.sciencealert.com/a-humpback-whale-has-been-found-dead-in-the-amazon-jungle

https://www.nytimes.com/2019/02/25/science/humpback-whales-amazon.html

https://en.wikipedia.org/wiki/Humpback_whale

https://en.wikipedia.org/wiki/Amazon_rainforest

Image Gallery: The Capital of the United States – Washington, DC


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The Washington Monument.
The Thomas Jefferson Memorial.
Trees at the Vietnam Veterans Memorial.
The United States Capitol.
Ulysses S. Grant Memorial and the Washington Monument.
Washington, DC.
Smithsonian Arts + Industries Building.

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Image Gallery: Laughlin in Nevada


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Laughlin in Nevada.
The Colorado River in Laughlin, Nevada.
Laughlin in Nevada.
The Colorado River in Laughlin, Nevada.
The Colorado River in Laughlin, Nevada.
The Colorado River in Laughlin, Nevada.

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Image Gallery: The Hoover Dam


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The spillway tunnel of the Hoover Dam.
The inlet towers of the Hoover Dam.
Mike O’Callaghan–Pat Tillman Memorial Bridge over the Colorado River.
The Hoover Dam.
The Colorado River downstream of the Hoover Dam.

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Ribosomes Play A Role in the Mechanism of Blood Cell Differentiation

Low ribosome levels in DB anemia affects blood cell differentiation.

Source: https://www.cell.com/cell/fulltext/S0092-8674(18)30213-7

Research Highlights

  • Diamond-Blackfan anemia (DB anemia) is a unique blood disorder where red blood cell precursors and progenitors are selectively reduced in the bone marrow of patients, while all other lineages are apparently produced normally.
  • Molecular lesions underlying DB anemia reduce the number of ribosomes in hematopoietic cells.
  • Ribosome composition remains constant in cells with DB anemia-associated lesions.
  • Low ribosome count selectively and negatively affects the translation of a part of messenger RNAs.
  • Translational disturbances in DB anemia impair lineage development in hematopoietic stem and progenitor cells.

Blood cell production is thought to occur through an order of differentiation steps. Some studies have shown that the cell production may occur earlier in hematopoietic stem and progenitor cells. The relationship between human blood diseases and the mechanism of these cell productions remain poorly understood. By studying a genetic blood disorder, Diamond-Blackfan anemia (DB anemia), where the majority of mutations affect proteins in ribosomes and the red blood cell production is selectively disturbed, the study is able to give light on information about the mechanism on how lineage commitment is produced normally and disrupted by the disease. The research shows that in DB anemia, the amount of ribosomes is low, while ribosome composition remains constant. The reduction in ribosome levels extremely alters translation of a select part of messenger RNAs. The study shows how the reduced translation of select RNA transcripts in hematopoietic stem and progenitor cells can impair the development of red blood cells, lighting up a regulatory role for ribosome levels in cell differentiation.

Source:

https://www.cell.com/cell/fulltext/S0092-8674(18)30213-7

Research Highlights: New species of red algae discovered and revised taxonomy


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By Franz Eugen Köhler, Köhler’s Medizinal-Pflanzen – List of Koehler Images, Public Domain, https://commons.wikimedia.org/w/index.php?curid=255300

New species of red algae discovered and revised taxonomy

  • A team of researchers has revised the taxonomy of Pyropia.
  • The research team responsible for the revision includes Professor Brodie and her colleagues from Jiangsu Marine Fisheries Research Institute, Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, and Natural History Museum.
  • Pyropia is a large genus of red alga which belongs to the family Bangiaceae, and the genus is extremely difficult or impossible to identify.
  • The research led to describing a new species and four new genera.
  • They come up with four new genera namely Calidia, Neoporphyra, Neopyropia, and Uedaea, and revived an old genus called Porphyrella.
  • One species was discovered but did not match any known taxa and was added to the new genus Calidia and named Calidia pseudolobata.
  • The researchers also moved Pyropia tenera and Pyropia yezoensis to the genus Neopyropia, and moved Pyropia haitanensis to Neoporphyra.

Sources:

Yang, L. E., Deng, Y. Y., Xu, G. P., Russell, S., Lu, Q. Q., & Brodie, J. (2020). Redefining Pyropia (Bangiales, Rhodophyta): Four New Genera, Resurrection of Porphyrella and Description of Calidia pseudolobata sp. nov. From China. Journal of phycology56(4), 862–879. https://doi.org/10.1111/jpy.12992

http://www.sci-news.com/biology/calidia-pseudolobata-08482.html

https://onlinelibrary.wiley.com/doi/10.1111/jpy.12992


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Image Gallery: Lake Havasu City in Arizona


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Lake Havasu and London Bridge at Lake Havasu City, Arizona.
The London Bridge in Lake Havasu City, Arizona.
Boats parked at Lake Havasu.
A fountain at Lake Havasu, Arizona.
The London Bridge at Lake Havasu City.
Lake Havasu, Arizona.

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Image Gallery: Smithsonian National Museum of Natural History in Washington, DC


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The Hope Diamond at the Smithsonian National Museum of Natural History.
Smithsonian National Museum of Natural History.
Leatherback turtle skeleton at the Smithsonian National Museum of Natural History.
Smithsonian National Museum of Natural History.
Carnivore skeletons at the Smithsonian National Museum of Natural History.
African Bush elephant at the Smithsonian National Museum of Natural History.
A sarcophagi at the Smithsonian National Museum of Natural History.
A mummy at the Smithsonian National Museum of Natural History.
Emerald necklaces at the Smithsonian National Museum of Natural History.
A Gray whale skeleton at the Smithsonian National Museum of Natural History.
Smithsonian National Museum of Natural History.
An African Bush elephant at the Smithsonian National Museum of Natural History.
Fluorescent rocks at the Smithsonian National Museum of Natural History.
A mummy at the Smithsonian National Museum of Natural History.

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Image Gallery: Salton Sea in Salton City, California


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Salton Sea in Salton City, California
Salton Sea in Salton City, California
Salton Sea in Salton City, California
Salton Sea in Salton City, California

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Image Gallery: Red Rock Scenic Overlook in Rimforest, California


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Red Rock Scenic Overlook in Rimforest, California
Red Rock Scenic Overlook in Rimforest, California
Red Rock Scenic Overlook in Rimforest, California
Red Rock Scenic Overlook in Rimforest, California
Red Rock Scenic Overlook in Rimforest, California
Red Rock Scenic Overlook in Rimforest, California
Red Rock Scenic Overlook in Rimforest, California

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