Zoos are becoming facsimiles - or perhaps caricatures - of how animals once were in their natural habitat. If the right policies toward nature were pursued, we would need no zoos at all.
As an entrepreneur, I am often asked how I kept my perseverance. Well, persevere comes from the latin roots purse, as in "money," and sever, as in "cut off." that's why I persevered.
In 2007, a zookeeper in Argentina was mauled and disemboweled by a Giant Anteater. The anteater either saw the zookeeper as a threat to her young, or she was just guarding her territory. Either way, they can be deadly.
Passenger trains often feature self-propelled carriages (multiple units) that can be joined with other units. Trains such as these are more energy efficient but may require more maintenance than a single locomotive vehicle.
