Science / Astrology / Vulcan: A hypothetical planet whose orbit is said to lie between Mercury and the Sun, about twelve million miles from the Sun. Astronomers have no evidence of this planet as yet.


Science / Chemistry / Vulcanization: A process of combining rubber with sulfur or other substances that causes the polymer chains to crosslink, making them stronger and more elastic. MORE

Boron (B)

Science / Periodic Table of Elements / Boron (B): Atomic number: 5, Atomic mass: 10.81 g.mol -1, Electronegativity: 2.0, Density: 2.3 at 20°C, Melting point: 2076 °C, Boiling point: 3927 °C, Vanderwaals radius: 0.098 nm, Ionic radius: 0.027 MORE

Arsenic (As)

Science / Periodic Table of Elements / Arsenic (As): Atomic number: 33, Atomic mass: 74.9216 g.mol -1, Electronegativity: 2.0, Density: 5.7 at 14°C, Melting point: 814 °C (36 atm), Boiling point: 615 °C (sublimation), Vanderwaals radius: 0.139 MORE

Selenium (Se)

Science / Periodic Table of Elements / Selenium (Se): Atomic number: 34, Atomic mass: 78.96 g.mol -1, Electronegativity: 2.4, Density: 4.79 at 20°C, Melting point: 217 °C, Boiling point: 688 °C, Vanderwaals radius: 0.14 nm, Ionic radius: 0.198 MORE


Entertainment / Ice Hockey / Puck: The puck is made of vulcanized rubber, and is one inch thick and three inches in diameter and weighs between five and one-half ounces and six ounces. The rules committee must approve all pucks used in MORE


Entertainment / Literature / Polygenesis: The theory that, if two similar stories, words, or images appear in two different geographic regions or languages, they are actually unrelated to each other. Each one arose independently. For an analo MORE