Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, ...
Pandemic 2: Disease Mutation. Pandemic 2 is a disease game that allows more flexibility in creating a plague, including whether you want to be a bacteria, parasite or virus. Each disease has its own strengths and weaknesses. Note: See below game for instructions and tips. (And be sure to use hand sanitizer when youâre done playing.)
Everyone knows the first one: smallpox. But you probably wonât guess the second one: rinderpest, a deadly livestock virus last seen in 2001, which has just been declared to be eradicated. The rinderpest virus caused several epidemics. Of course science and health surveillance have a way to go. There are about 100,000 human diseases that have been described, by one estimate. If only we were as efficient at snuffing out diseases as we are, apparently, at eradicating species.