Natural science sciences, there are three great branches of "natural science" which stand apart by reason of the variety of far reaching deductions drawn from a small number of primary postulates — they are mechanics, electrodynamics, and thermodynamics. Today, natural sciences are more commonly divided into life sciences, such as botany and zoology; and physical sciences, which include physics, chemistry, geology, astronomy, and materials science. Natural science Natural science is a branch of science concerned with the description, prediction, and understanding of natural phenomena, based on empirical evidence from observation and experimentation. Mechanisms such as peer review and repeatability of findings are
Earthly Branches Earthly Branches, which is somewhat similar to the modern-day practice of English-speaking pilots using "o'clock" for directions. Since 12 points were not enough for sailing, 12 midpoints were added. Instead of combining two adjacent direction names, they assigned new names: The 24 directions are: Advanced mariners such as Zheng He used 48-point compasses. An additional midpoint was called by a combination of its two closest basic directions, such as ("bǐngwǔ") for the direction of 172.5°, the midpoint between ("bǐng"), 165°, and ("wǔ"), 180°. Earthly Branches The twelve Earthly Branches or Terrestrial Branches are an ordering system used throughout East Asia