- Centipede (Atari 2600) online game (atarionline.org)
In Atari 2600 Centipede, the main objective is to shoot all the segments of a centipede as it winds its way down the playing field. The centipede moves horizontally across the screen, and when it hits a mushroom or the edge of the screen, it drops down one row and changes direction. The player controls a small bug blaster at the bottom of the screen, firing shots at the centipede and other enemies such as spiders, scorpions, and fleas. (Millipede, released in 1982, is the arcade sequel to Centipede. It features more gameplay variety and a wider array of insects than the original game.)
- Carton (Wikipedia)
A craton ( /ˈkreɪtɒn/ KRAYT-on, /ˈkrætɒn/ KRAT-on, or /ˈkreɪtən/ KRAY-tən; from Ancient Greek: κράτος kratos “strength”) is an old and stable part of continental lithosphere (the Earth’s two topmost layers, the crust and the lithospheric mantle). Having often survived cycles of merging and rifting of continents, cratons are generally found in the interiors of tectonic plates; the exceptions occur where geologically recent rifting events have separated cratons and created passive margins along their edges. Cratons are composed of ancient crystalline basement rocks covered by younger sedimentary rocks. They have a thick crust and deep lithospheric roots extending several hundred kilometres into Earth’s mantle. In simpler terms, craton is a layer of the earths crust on that has been almost unchanged through all of history. This crust consists of shields and platforms. Shields are made of basement rock and are visible, while platforms is the portion not visible made up of sedimentary rock.