- Pangaea or Pangea (/pænˈdʒiː.ə/) was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It assembled from the earlier continental units of Gondwana, Euramerica and Siberia during the Carboniferous approximately 335 million years ago, and began to break apart about 200 million years ago, at the end of the Triassic and beginning of the Jurassic. In contrast to the present Earth and its distribution of continental mass, Pangaea was centred on the equator and surrounded by the superocean Panthalassa and the Paleo-Tethys and subsequent Tethys Oceans. Pangaea is the most recent supercontinent to have existed and the first to be reconstructed by geologists.
- Duck and Cover (film) (Wikipedia)
Duck and Cover is a 1951 American civil defense animated and live action social guidance film that is often mischaracterized as propaganda. It has similar themes to the more adult-oriented civil defense training films. It was widely distributed to United States schoolchildren in the 1950s, and teaches students what to do in the event of a nuclear explosion.