Mayans had many breakthroughs in astronomy and mathematics. Priest studied the sky with observatories. They were able to track the movement of stars and planets with great accuracy. The Mayans used their observations to calculate the solar year. The Mayan figure for their year of 365.2420 days is amazingly precise.These calculations allowed the Mayas to create their solar calendar of 365 days. They also had a sacred 260-day calendar. Every 52 years, the first date in both calendars fell on the same day. This gave the Mayas a longer unit of time that they called a Calendar Round. For the ancient Mayas, this 52-year period was something like what a century is to us.
The Mayas also recognized the need for zero.
One of the Aztecs’ most remarkable technological achievements was the construction of their island city Tenochticlan. the aztecs enlarge the area of the city by creating artificial islands called chinampas. Today many people visit those chinampas and their flowers vendors. The aztecs adapted the Mayan solar and sacred calendars. The calendar was useful for farming , since it tracked the seasons. One of the most famous Aztec artifacts is a calendar called the Sun Stone. Dedicated to the god of the sun, this beautifully carved stone is nearly twelve feet wide and weighs almost twenty-five tons. The center shows the face of the sun god.
It took 1 year to travel from one end of the Islamic empire to the other. Baghdad was the fabled city of wealth that existed at the heart of the Islamic Empire :)
According to research by Taylor and her colleagues (1984), <u>perceived control</u> is likely to reduce stress related to a negative life event such as cancer.
Explanation:
Shelley Taylor and her colleagues contributed to the effects of perceived control in the treatment of cancer.
Perceived control is the feeling or a belief by a person which determines his/her own inner state or behavior and influence and modify his/her or one’s own environment in order to bring about the desired outcome.
In the treatment of cancer, perceived control of behavior acts as a control strategy to deal with the immense amount of stress it causes to a person. This provides emotional well being and stability by enhancing the ability and preparing a person to cope up with the stress.
This in turn makes him/her to be mentally strong to bear the stress, feel less pain, and to be supportive with the treatment. This also reduces the impact of stress on physiological parameters like blood pressure, heart rate etc and improves the overall health of the patient.
Perceived control can also be used to cope with stress induced by negative life events like loss of someone dear, joblessness, marital or relational issues, chronic diseases etc
Answer:
Boats of the Neolithic era were very simple. They were essentially rafts, made of easy to find materials such as wood.
In the Neolithic, there were many cultures that built boats, and sailed across the sea, but mostly for relatively short distances. Interoceanic navigation was essentially null.
Boats of the modern era have evolved a lot. From sailing boats, to large rowing boats like the Viking longships, to mechanical boats of the modern era. This evolution is to be expected since boats are among the first human inventions in history, dating back to thousands of years before the Neolithic Revolution.