Travel

11. Apr. 2020

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 …

07. Apr. 2020

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 …

05. Apr. 2020

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 …

17. Mar. 2020

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 …