The term "Great Plains", for the region west of about the 96th or 98th meridian and east of the Rocky Mountains, was not generally used before the early 20th century. Nevin Fenneman's 1916 study, Physiographic Subdivision of the United States, brought the term Great Plains into more widespread usage. Before that the region was almost invariably called the High Plains, in contrast to the lower Prairie Plains of the Midwestern states. Today the term "High Plains" is used for a subregion of the Great Plains.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): who brought the term great plains into widespread usage?
Ah, so.. Nevin Fenneman's

Many, if not most, birds migrate in flocks. For larger birds, flying in flocks reduces the energy cost. Geese in a V-formation may conserve 1220% of the energy they would need to fly alone. Red knots Calidris canutus and dunlins Calidris alpina were found in radar studies to fly 5 km/h (3.1 mph) faster in flocks than when they were flying alone.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How much faster do Red knots and dunlins fly in a flock?
Ah, so.. 3.1 mph

Today, with a long cultural tradition and strong support from local educational institutions, Nanjing is commonly viewed as a "city of culture" and one of the more pleasant cities to live in China.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What city is considered one of the more pleasant cities to live in, by the Chinese?
Ah, so..
Nanjing