Edited sentence: & oldest YUG is 'Satyug', It means that Hindu Dharma is not only 3000-4000 BCE old, Hindu Dharma is around 1,728,000 years(Satyug- Lord Vishnu-Manu) + 1,296,000 years (Treta Yug- Lord Ram) + 864,000 years (Dwapar yug- Lord-Krishna)= 3888000 years old Now Kaliyug- 432,000 years.According to Bhagavad Gita 3.11.19, which is dated at 500-1000 CE, the Yugas are much longer, namely 1,728,000 years, 1,296,000 years, 864,000 years and 432,000 years:.According to the Laws of Manu, one of the earliest known texts describing the yugas, the length is 4800 years + 3600 years + 2400 years + 1200 years, for a total of 12,000 years for one arc, or 24,000 years to complete the cycle, which is one precession of the equinox).It is this second sloka which appears to have been modified over the years.Most of articles & people says Hindu dharma is about 3000-4000 BCE old & started from 'Krishna', but YUG says 'Krishna' was in 'Dwapar yug'-this is 3rd YUG.So Hindus & Indus river velly all history is new & false.Srimad Bhagavatam 3.11.19 describes the timespans of the demigods, in which a year of a yuga is a year of the demigods.The truth is Satya Sanatan Dharma- Hindu.The value of 24,000 years fits relatively close with the modern astronomical calculation of one full precession of the equinox, which takes 25,772 years.These 4 yugas follow a timeline ratio of (4:3:2:1).Thus the yuga cycle may have some basis in known terrestrial cycles.While the long yuga count is the most popular, it does not correlate to any known celestial motion found in the Astronomical Almanac