Recently, however, a long and detailed study of fairly large groups of crania of both people has been made.[119] The results of this investigation suggest that, while there are some differences between the two series, they are not of great significance and that, therefore, the Basketmakers and the Pueblos were basically the same people. This is confirmed by cultural evidence, for, although changes occurred, there is a strong continuity of development from Basketmaker to early Pueblo times. Possibly there was some coming in of new people, who introduced new ideas which gave impetus to the cultural development; but it is now difficult to accept the theory of a mass invasion by a racially different group and of a radical change in physical type. In the light of this new evidence some archaeologists feel that the term “Anasazi” should be dropped, and the entire culture, including the Basketmaker and Pueblo phases, should be called “Pueblo” or “Puebloan.”[7] One factor which tended to make the Pueblo people seem extremely broad-headed was the habit of deforming the skull posteriorly, a practice which became almost universal in Pueblo times. A skull markedly flattened in back inevitably appears broader than one which is undeformed. This effect is believed to have been produced by strapping babies against hard cradle-boards or by using a hard head-rest. The soft skull of the infant was flattened by pressure in the back and, as the bones grew and hardened, this deformity became permanent. [Illustration: Fig. 20—a. Undeformed skull, b. Deformed skull.] The question naturally arises: Why did people wish to have deformed skulls? We cannot be sure of the answer, of course, but it seems possible that it represents nothing more than a matter of fashion and a change in ideals of beauty. Even in our own society there are fashions in physical appearance as well as in clothing and adornment. One need only compare the corn-fed curves of the Floradora sextette with the emaciated lines of “flappers” of the 1920’s to realize that we have little eccentricities of our own which might seem incomprehensible to a prehistoric Indian. Important changes which mark the transition between the Basketmaker era and Pueblo times occurred in the realm of architecture. There are also differences between the first half of the Developmental Pueblo period, sometimes known as “Pueblo I,” and the second half which is sometimes called “Pueblo II.” In a general way we can trace the evolutionary development from pit houses, with associated granaries, to the fairly complex surface domiciles and subterranean ceremonial chambers of the final phase of the period.[113] Progress did not follow the same pattern in all places, however, nor did all similar changes occur at the same time.