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Definition – Hornfels is a fine-grained metamorphic rock that was formed by the contact between mudstone/shale, or other clay-rich rock, and a hot igneous body,…

The Acropolis of Athens is one of the most famous ancient archaeological sites in the world. It is an ancient citadel located on a rocky…

Nitric Acid (HNO3) is a very corrosive and toxic strong acid that can cause severe burns. It is both extremely corrosive and toxic. It is…

A joint venture is a business arrangement where two or more companies get into a temporary legal partnership. A contractual agreement is signed by the…

Caveat Emptor This is a general law applied to the sale of goods. It is a Latin term meaning “let the seller beware,” in contrast to…

Definition – Chert (/ˈtʃɜːrt/) is a sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2). It occurs as nodules,…

Potassium nitrate is a chemical compound. It has the chemical formula KNO3. It is an ionic salt of potassium ions K+ and nitrate ions NO3−,…

“Petra” (Arabic: ٱلْبَتْرَاء‎, romanized: Al-Batrāʾ; Ancient Greek: Πέτρα, “Stone”), originally known to its inhabitants as Raqmu, ancient city, centre of an Arab kingdom in Hellenistic…

Persepolis (/pɝˈsepəlɪs/, Old Persian: Pārsa) modern Takht-e Jamshīd or Takht-i Jamshīd (Persian: “Throne of Jamshīd,” Jamshīd being a character in Persian mythology), was the capital…

Cause Proxima This Latin phrase meaning the proximate cause is used in case of Marine loss. It is an act, whether intentional or negligent, that…

Introduction – Novel Coronaviruses (nCov) are a group of viruses that cause diseases in mammals and birds. In humans, coronaviruses cause respiratory tract infections that…

Potassium Chlorate is a chemical compound. Its chemical formula is KClO3. It has potassium and chlorate ions. In its pure form, it is a white…