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Updated: Jan 19, 2026
Extinction: Diversity and Extinction during the Paleogene Epoch - Concept
Childhood Scurvy: A Nearly Extinct Disease Posing a New Diagnostic Challenge, a Case Report
Neeraj Gupta1, Nisha Toteja1, Rohit Sasidharan1
1Department of Pediatrics, All India Institute of Medical Sciences, Jodhpur, Rajasthan 342001, India.
Abstract:
Scurvy is seldom encountered in modern day clinical practice. Children can present with nonspecific features which can mimic several other common conditions. We describe here a four-year-old child who presented with severe pain and weakness of bilateral lower limbs and found to be severely malnourished. The diagnosis of scurvy was suspected in the context of underlying malnutrition after excluding other ominous pathologies. Pathognomic radiological changes clinched the diagnosis, and the best supportive evidence was the dramatic response to vitamin C supplementation.
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Extinction
Fossils of organisms that were different from anything alive today had been documented as early as the 17th century, but it was not until the early 19th century that scientists began to recognize that the successive layers of fossil bearing rocks were like successive pages in the history of life on earth. Although this recognition gave rise to the birth of the field of paleontology, the idea of complete global extinction of a species had yet to be fully accepted. At...
Extinction
ExpandBegin this procedure by reading the extinction reading supplement that has been printed out for you. NOTE: Alternatively, you may download the reading supplement at the link below. Click here to download the extinction reading supplement
Using the information contained in the extinction reading supplements pertaining to the taxa of interest and the Chicxulub impact event, make predictions for each taxon listed in Table 1. Consider...
Extinction
ExpandFirst, familiarize yourself with the extinction reading supplement for the background on what took place and where existing theories stand.
Also, print out an appropriate number of copies to have one per student.
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