Thorax

The Permian Mass Extinction Introduction There are five major extinctions in history: the Late Devonian, the Ordovician-Silurian, the Permian-Triassic, the Triassic-Jurassic, and the Cretaceous-Tertiary. Known as the Big Five, these extinctions exceeded all others in size and destruction, each killing more than 60% of species from that period. Each one acted as a bottleneck, allowing the survival of only a fraction of the organisms that had been thriving before, from which evolution and life…

Exploring 30-day children?s readmission rate in a general hospital. K van Driel1*, GS de Wolf2, R. van Schaik3 1 Division woman and child, Diakonessenhuis Utrecht, the Netherlands 2Department of clinical methods and Public Health, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands 3Division woman and child, Diakonessenhuis Utrecht, the Netherlands * Corresponding author: K van Driel, Division Woman and Child Diakonessenhuis…