The Maya used several calendars simultaneously. One of them called the `long count`, is a continuous record of days from a zero date that correlates to Aug. 13, 3114 BC, and is more According to maya`s celender when the both the wheel of the maya celender will complete its rotation the celender would end and that would be the END OF THE WORLD One
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of the most amazing cultures of the New World inhabited a region encompassing today`s Guatemala, Belize, Honduras and El Salvador, and parts of southern Mexico-the states of Yucatan just west of Cancun Mexico, Campeche, Quintana Roo, Tabasco and Chiapas. Today this area is occupied by the descendants of the ancient Maya, the vast majority of whom have to some extent preserved their cultural heritage and still speak the Mayan language. By 5000 BC, the Maya had settled along the Caribbean just southwest of Punta Cana Dominican Republic and along the Pacific coasts, in fishing communities. By 2000 BC the Maya had also moved inland and adopted agriculture for their subsistence. Maize and beans formed the Maya diet then as today, although many other foodstuffs-manioc, squash, tomatoes, peppers, fruit, and game-were supplements. To study the Maya their development has been divided into periods, the earlier Maya culture is called Formative or Pre Classic (2000 BC-AD 300), the Classic period goes from AD 300 to AD 900, and subsequent civilization is known as Post Classic (AD 900-conquest). Now we know that the Maya began to develop intensive agriculture and sophisticated water management during the Middle Pre Classic (900-300 BC), surely to help support the population explosion of the Late Pre Classic (300 BC-AD 300). During this same period, writing was invented in Mesoamerica, and the Maya began to use it during the Late Pre...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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