Ballpoint pen ink is a mixture mainly composed of dyes or pigments, mixed with an oily or viscous solvent. This viscosity, in other words the...
Fog is simply water vapor present in the air that turns back into liquid upon contact with a cold surface. Warm air can hold much...
The cut of the diamond is truly THE key criterion that determines how the stone will sparkle. If it is well cut, light enters the...
During a lucid dream, the brain exhibits a particular activity, notably in the prefrontal cortex, an area involved in decision-making, self-criticism, and self-awareness. Normally, during...
The Moon rotates on its axis at exactly the same rate that it orbits the Earth. This is called synchronous rotation. Basically, it takes about...
