Travel
The secret about divided mineral particles
Sand is a granular material composed of finely divided rock and mineral particles. It is defined by size, being finer than gravel and coarser than silt. Sand can also refer to a textural class of …
Finding the existential horizon
The horizon or skyline is the apparent line that separates earth from sky, the line that divides all visible directions into two categories: those that intersect the Earth's surface, and those that …
Evolutionary history of citrus revealed
The orange is the fruit of the citrus species Citrus × sinensis in the family Rutaceae, native to China. It is also called sweet orange, to distinguish it from the related Citrus × aurantium, …
Force between two negative masses
The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity. The atmosphere of Earth protects life on Earth by creating …
From collaboration to a theory of practice
Collaboration is the process of two or more people or organizations working together to complete a task or achieve a goal. Collaboration is similar to cooperation. Most collaboration requires …