So it started with the first pyramid in small bricks. They mastered their technology, improved the dimension of the blocks and they ended with the first pyramid of that is the rhomboidal, where the blocks are still... transported to the site, but... are becoming too big, and for the of Sneferu... they are cast, they are pound[ed] on site. We then arrive to the Giza Plateau where this technology was used for the Cheops, Chephren and Mykerinos pyramids.

Interest was heightened by the knowledge that the 162,000 acres of land already cultivated in the , where is located, were to triple through a great irrigation project inaugurated by . In 1930 it was well under way when the project was abandoned. An American engineer, Charles W. Sutton, long in the service of Peru, was adding to his fame and usefulness by undertaking to bring from the Huancabamba River, tributary to the Amazon, by means of a tunnel through the mountains, water to supplement the service of the coastal streams.

So we started with mud bricks that were used in the enclosures during the 2nd Dynasty. They did not have stone [working, hard metal] tools so... they used mud bricks. Then... the invention of the first limestone bricks by agglomeration. The technology improved into bigger and bigger... limestone blocks, and then suddenly, 800 years later, they had tools to cut the stone. No! They returned to pyramids made of mud brick. So this is something is not capable of explaining. It is something that ic technology is capable of explaining, essentially because here we had a stop of the use of this technology to make stone.

Mughal (1993) proposes the following outline: On the Pakistan side, archaeological evidence now overwhelmingly affirms that the Hakra was a perennial river through all its course in Bahawalpur during the fourth millennium . . . and early third millennium B.C. About the middle of the third millennium B.C., the water supply in the Northeastern portion of the Hakra [the Yamuna] was consider- ably diminished or cut off. But, abundant water in the lower (southwestern) part of this stream was still available, apparently through a channel from the Sutlej. . . . About the end of the second, or not later than the beginning of the first millennium B.C., the entire course of the Hakra seems to have dried up. (4)

[L]ime is very important and it has been shown by [(1990) Professor D.D.] Klemm: "...in the VI. Dynasty lime disappears nearly within the mortars. May this be interpreted as a variation in the accessibility of fuel [of wood] and consequently of economic potential and crisis?" ...He was talking about the regular lime that is calcined from limestone in a kiln. ...[W]e have not found any remains of kilns... to manufacture the pyramids of Cheops and Chephren. We need... 150,000 tons of lime, which means that we should have found remains of kilns. We did not... which means that the technology was different. ...[I]t was the one of ashes that contains lime... The ecological disaster came from the over-exploitation of wood... proven by the fact that just after the Great Pyramids, one gets frescoes... describing famines...

There is nothing that we know of in pre-historic Egypt or Mesopotamia or anywhere else in Western Asia to compare with the well-built baths and commodious houses of the citizens of Mohenjo-daro. In those countries, much money and thought were lavished on the building of magnificent temples for the gods and on the palaces and tombs of kings, but the rest of the people seemingly had to content themselves with insignificant dwellings of mud. In the Indus Valley, the picture is reversed and the finest structures are those erected for the convenience of the citizens.

In North America the evidence is that hunter-gatherers bounced back quite successfully within less than a millennium of the onset of the Younger Dryas, and thereafter there is a thin but fairly continuous archaeological record. What is mysterious is not so much the early appearance of mound-building in this new age — perhaps as early as 8,000 years ago, as we've seen — or the sophistication of sites such as Watson Brake 5,500 years ago, nor even their obvious astronomical and geometrical connections to later vast earthworks such as Moundville and Cahokia, but that in this early monumental architecture of the New World memes of geometry, astronomy, and solar alignments consistently appear that are also found in the early monumental architecture of the Old World at iconic sites such as Stonehenge and the Great Pyramid of Giza. A tremendous leap forward in agricultural know-how, coupled with the sudden uptake of eerily distinctive spiritual ideas concerning the afterlife journey of the soul, also often accompanies the architectural memes. It's therefore hard to avoid the impression that some kind of 'package' is involved here.

There is evidence for the intensification of subsistence practice, multicropping and the adoption of new forms of transportation (camel and horse). These changes were made by the indigenous inhabitants, and were not the result of new people streaming into the re- gion. The horse and camel would indicate connections with Central Asia. The cultiva- tion of rice would connect with cither the Late Harappan in the Ganga-Yamuna region or Gujarat. (Kenoyer 1995, 227;)

Archaeological evidence demonstrates that the Hakra flood plain was densely populated between the fourth and the second millennia B.C.... the Ghaggar-Hakra is ‘often identified with the sacred Sarasvatī River of the Vedic Aryans’... ‘certain that in ancient times the Ghaggar-Hakra was a mighty river, flowing independently [of the Indus] along the fringes of the Rann of Kutch’.

The origin myth of the Tukano speaks of the time, eons ago, when humans first settled the great rivers of the Amazon basin. It seems that 'supernatural beings' accompanied them on this journey and gifted them the fundamentals upon which to build a civilized life. From the 'Daughter of the Sun' they received the gift of fire and the knowledge of horticulture, pottery-making, and many other crafts. 'The serpent-shaped canoe of the first settlers' was steered by a superhuman 'Helmsman.' Meanwhile other supernaturals 'travelled by canoe over all the rivers and ... explored the remote hill ranges; they pointed out propitious sites for houses or fields, or for hunting and fishing, and they left their lasting imprint on many spots so that future generations would have ineffaceable proof of their earthly days and would forever remember them and their teachings.

Another element of continuity between ceramics of the third millennium Baluchistan and those of the second millennium can be found in the decoration. While the geometric painted designs on pottery from Pirak may be quite different from those on Harappan pottery, they are very much in the older ‘Quetta-Amri’ tradition. In our report on Pirak we pointed out similarities which we feel are too close to be explained merely as a result of coincidence. We postulated that such traditional styles of decoration survived in regions which were at the periphery of the principal zone of Harappan influence... ...Should the origins for these transformations of the second millennium be sought in exogeneous events, in colonization of the area by new peoples, by a sudden influx of refugees bringing new crops and animals with them? Probably not, since the processes which I have briefly described are too complex to be attributed to the arrival of invaders who at the same time would have had to have introduced rice from the Ganges, sorghum from the Arabian Gulf, and camels and horses from Central Asia. It is also not likely that the newcomers, whether they be a ruling elite or refugees, would have had the impetus to change an agricultural system still capable of being intensified without the introduction of new crops and, for rice, new irrigation practices.

On the Pakistan side, archaeological evidence now available overwhelmingly affirms that the Hakra was a perennial river through all its course in Bahawalpur during the fourth millennium B.C. (Hakra Period) and the early third millennium B.C. (Early Harappan Period).

The numerous and substantial mud brick “granaries” built by the close of Period HA at Mehrgarh, in the first half of the 5th millennium B.C., suggest a concern, unparalleled in contemporary cultures, for surplus production irrespec­tive of what was stored in them.

Now we know that man is more than two million years old,' exlaimed Heyerdahl, 'it would be very strange if our ancestors lived like primitive food collectors for all that time until suddenly they started in the Nile valley, in Mesopotamia and even in the Indus valley, to build a civilization at peak level pretty much at the same time. And there's a question I ask that I never get an answer to. The tombs from the first kingdom of Sumer are full of beautiful ornaments and treasures made of gold, silver, platinum, and semi-precious stones — things you don't find in Mesopotamia. All you find there is mud and water — good for planting but not much else. How did they suddenly learn — in that one generation just about — where to go to find gold and all these other things? To do that they must have known the geography of wide areas, and that takes time. So there must have been something before.