Evaluation of Israeli students, 392 in grades 7-9 and 381 in grades 10-12, in the domain of literature supported the construct validity of the 4 X 4 Structure of Giftedness Model, in which giftedness is conceptualized in 4 categories of general and specific intellectual ability and original thinking and 4 ordered ability levels embedded in a…

There have been few discoveries in geology more important than "deep time"--the understanding that the universe has existed for countless millennia, such that man's existence is confined to the last milliseconds of the metaphorical geological clock. The influence of deep time is felt in a variety of sciences including geology, cosmology,…