Subcategories

• Physics
  Physics is the science of matter and its motion as well as space and time — the science that deals with concepts such as force, energy, mass, and charge. Physics is an experimental science;it is the general analysis of nature. Its purpose is to understand how the universe behaves.

  Physics is one of the oldest academic disciplines. It emerged as a modern science in the 17th century, and through its modern subfield of astronomy, it may be the oldest of all. Those who work professionally in the field are known as physicists. [WikiPedia]

   

• Biology
  Biology is the science of life (from the Greek words bios = life and logos = reasoned account). It is concerned with the characteristics and behaviors of organisms, how species and individuals come into existence, and the interactions they have with each other and with their environment. Biology encompasses a broad spectrum of academic fields that are often viewed as independent disciplines. Together, they study life over a wide range of scales.
  en.wikipedia.org/wiki/Biology
• Astronomy
  Astronomy (from the Greek words astro(αστέρι) = star and nomos(νόμος) = law) is the scientific study of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earth's atmosphere (such as the cosmic background radiation). It is concerned with the evolution, physics, chemistry, meteorology, and motion of celestial objects, as well as the formation and development of the universe. [WikiPedia]