The green type of this reptile gained protection in the 20th century because of its popular use in soup
When the Moon very rarely actually looks blue, it's because of a 
certain size... [DOC] [TLE] Twentieth Century to 1945 | Encyclopedia of Greater Philadelphia [PAR] Although the region's rate of industrial growth slowed in the first half of the 
twentieth century, the demands created by war energized manufacturing, 
particularly... [DOC] [TLE] Twentieth Century after 1945 | Encyclopedia of Greater Philadelphia [PAR] In the second half of the twentieth century, an era of social change, 
manufacturing in the Philadelphia region plummeted as northeastern states lost 
factories.