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Hace 23 horas · There were 1,245 press releases posted in the last 24 hours and 391,533 in the last 365 days.
Hace 1 día · Un inventor desde sus inicios. Nacido en Beaver Falls, Pennsylvania, en 1889, Midgley se aficionó muy pronto a encontrar aplicaciones útiles para sustancias conocidas. En el instituto utilizaba ...
Hace 1 día · NUEVA YORK (AP) — Caleb Carr, el talentoso hijo del poeta beat Lucien Carr que soportó una infancia traumática y se convirtió en un popular novelista, un consumado historiador militar
Hace 1 día · A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin: philosophiae doctor or doctor philosophiae) is the most common degree at the highest academic level, awarded following a course of study and research. The degree is most often abbreviated PhD (or, at times, as Ph.D. in North America).It is derived from the Latin Philosophiae Doctor, pronounced as three separate letters (/ p iː eɪ tʃ ˈ d ...
Hace 1 día · Since their discovery in significant numbers in the Sloan Digital Sky Survey (SDSS; Zakamska et al. 2004), QSO2s have been studied in various wavelengths and with various observational techniques.They typically have an optical emission line spectrum consisting of narrow lines from low-ionisation species (e.g. [OII] λ λ 3727, 3730 𝜆 𝜆 3727 3730 \lambda\lambda 3727,3730 italic_λ ...
Hace 16 horas · University of Pennsylvania: had its School of Medicine founded by Edinburgh graduate John Morgan, who modelled it after Edinburgh Medical School. [118] [119] Princeton University : had its academic syllabus and structure reformed along the lines of the University of Edinburgh and other Scottish universities by its sixth president John Witherspoon , an Edinburgh theology graduate.
Hace 1 día · Diorama der Höhle von Altamira (Museu d’Arqueologia de Catalunya, Barcelona) Denkmal in Erinnerung an die Cortes von Cádiz (1810–1813), die die erste spanische Verfassung schufen.. Die Geschichte Spaniens reicht derzeit 1,4 Millionen Jahre zurück. Der Neandertaler verschwand wohl vor 45.000 Jahren. Das Neolithikum (ab dem 6. Jahrtausend v. Chr.), der Übergang von der aneignenden ...
