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Sponges
Sponges, also known as porifera, are considered as marine invertebrates...
Stratosphere
The stratosphere is the layer of the atmosphere located between the...
Sophists
The sophists were great thinkers who developed all their activity...
Sustainable development
Sustainable development is a concept that takes into account nations' evolution...
Satire
Satire is a literary resource characterized by the use of...
Social stratification
In sociology, social stratification is used to refer to inequalities between...
String instruments
String instruments are musical instruments that can emit different sounds...
Shinto
Shinto is a Japanese religion based on Kami worship or nature...
Saponification
Saponification is that chemical process performed on fatty bodies in which...
Scenography
Scenography, as its name indicates, is a discipline that allows us to...
Social law
Social law is the area of law that is based on the...
Sombrero Galaxy
Sombrero Galaxy is a giant elliptical galaxy if seen from the...