The 1918 flu pandemic, commonly referred to as the Spanish flu, was a category 5 influenza pandemic caused by an unusually severe and deadly Influenza A virus strain of subtype H1N1.
Project Lead The Way (PLTW) is an American nonprofit organization that develops STEM curricula for use by US elementary, middle, and high schools.
Post-coital tristesse. Post-coital tristesse (PCT) or post-coital dysphoria (PCD) is the feeling of sadness, anxiety, agitation or aggression after sexual intercourse. Its name comes from New Latin postcoitalis and French tristesse, literally sadness.