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Shri Ashtapad Maha Tirth - II
Nevertheless, the recent investigations reveal that the brain size of hominids has increased approximately threefold during the evolution of the hominids from Australopithecus to Homo sapiens. It is proposed that the principal reason for this increase is that larger brains conferred greater intelligence, and greater intelligence conferred a selection advantage. A number of anthropologists have difficulty accepting this thesis because they believe that brain size is not associated with intelligence in man. Evidence is reviewed, and new evidence from two studies further confirms that brain size as measured by head size is positively correlated with intelligence as measured by intelligence tests. It is considered that brain size is positively associated with intelligence in man and that this is the major reason for the increase in brain size of the hominids during the last 3.2 million years. Considering the trend of increasing brain size and intellect continuing over time we may address the question how during the period of Bhagwan Rushabhdev the man evolved with larger forehead (brain size) and the intellect sometimes around 10-20 thousand years before present. Thus based on human evolution and brain size versus intellect I may further narrow down the birth period of Bhagwan Rushabhdev between 3.2 Ma and 10000 years from now. I would also like to briefly mention again that forehead and physical structure of Bhagwan Rushabhdev described in previous section under Jain scriptures is also significantly larger and similar to what scientific evidences reveal. 3. Forces Influencing Earth's Climate As shown in Figure 6, the climatic cycle over the Earth is governed mainly by five major forces viz. (1) Earth, (2) Geodynamics of Earth's Inner Core and Mantle, (3) Solar, (4) Cosmic Ray and (5) Greenhouse gases. The Earth Force reveals: a). 41 kyr axial tilt cycle, b). 100 kyr eccentricity cycle, c). 100 kyr equatorial plane oscillation with respect to the ecliptic, and d). 23 kyr cycle of the precession of the equinoxes. Among all five forces the Earth's force is
Climate Cycle
Major Climate Drivers Earth Forcing: a) 41 kyr axial tilt cycle
b) 100 kyr eccentricity cycle c) 23 kyr cycle of the precession of the equinoxes Geodynamics of Earth's Inner Core and Mantle: a) Super-rotation and inner-core nutation b) Super-plumes c) Subducting
d) Tectonics plates and volcanoes Solar Forcing : a) 11 yr Solar Cycle
b) other solar cycles Cosmic Ray Forcing: a) Related to heliosphere and magnetosphere shielding b) Only the high energy cosmic rays play a role Greenhouse gases : a) CO2
b) Methane c) Water vapor
Fig.6: Major drivers of climate change over the Earth.
New Techniques to discover Ashtapad
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