Killed steel is deoxidized during casting to create a more uniform texture, increase density and durability. Deoxidizing prevents carbon monoxide bubbles that compromise steel integrity. Killed steel is denser and stronger than non-killed steel, but may shrink during casting. Killed steel is a form of steel that has been treated to completely deoxidize it when […]
Killed steel is treated with an oxidizing agent to prevent carbon dioxide bubbles from forming, resulting in a denser and stronger steel. Deoxidizing improves hardness and chemical homogeneity, but can cause shrinkage. Stainless and structural steels are usually killed, as are those used for forging and heat treatment. Steel that has been treated with an […]
Columbus enslaved the Taino people on Hispaniola for European settlers, leading to the death of 90% of the population from European diseases and harsh slavery. The Taino were skilled in agriculture and inventive, but did not have a written language or religious practices. They made beautiful pottery and were free to leave their partners without […]
The Romanovs were the last imperial family to rule Russia. They were killed in 1918 by Bolshevik revolutionaries, and their bodies were disposed of in a difficult undertaking. The mystery of who, if anyone, survived the massacre is still pending. The Romanovs were the last imperial family to rule Russia. With their rule spanning over […]
The Aztec empire was overthrown by Spanish conquistadors in 1521, and epidemics wiped out 80% of the population within 50 years. A team of paleopathologists identified a deadly strain of Salmonella enterica, Paratyphi C, as the cause of the outbreaks, likely brought to Mexico by the Spanish and spread through infected food or water. The […]
The idiom “curiosity killed the cat” warns that acting on curiosity can be dangerous, stemming from cats’ natural curiosity. It can be used in various situations, discouraging physical harm or nosiness. It suggests that quiet individuals are more desirable, and can be used to scare children from exploring. The phrase “curiosity killed the cat” is […]
