ArcaMax

Knowledge

on Feb 22, 2025

Topaz
Opal
Fluorite
Corundum

Opal. Since water is part of the opal's chemical formula, exposing it to water makes it weak and subject to chipping.

Science Trivia / February 21, 2025

Waves. The wavelength of matter is called the de Broglie wavelength.

Science Trivia / February 21, 2025

Coal. Anthracite coal as the highest carbon content.

Science Trivia / February 20, 2025

Technology. Technology employs tools, knowledge, techniques and systems to solve problems.

Science Trivia / February 20, 2025

Spiral. Edwin Hubble first described a spiral galaxy in "The Realm", his 1936 work.

Science Trivia / February 19, 2025

Migrating. Canada Geese that have ample food supplies don't migrate and don't teach their offspring to migrate.

Science Trivia / February 19, 2025

Diamond. A diamond is a form of carbon.