Biogas can be produced from organic material (manure, plant waste, organic waste) using...
The torii is a traditional Japanese gate built at the entrance of shrines.
Mirror image isomers of asymmetrical shapes and solids are non-superimposable.
Several analogous types of eyes have developed independently through convergent evolution.
The American Civil War was fought between the Confederacy and the Union.
Edison´s invention records and plays sound from a cylinder, while Berliner´s apparatus...
A type of sugar found in mammalian milk.
A transformer is a device used for converting the voltage of electric current.
Highly committed Japanese soldiers fought primarily at the Asian and Pacific theatres of...
The Japanese Mitsubishi A6M, commonly known as 'Zero' to the Allies, was a legendary...
This animation demonstrates the process of star development for average and massive stars.
The battleship USS Missouri, first deployed during WWII was also deployed in the Gulf War.
The Hubble Space Telescope orbits outside the distorting influence of Earth´s atmosphere.
A compound formed as white smoke during the combustion of phosphorus.
This animation demonstrates how mobile phones work.
This animation demonstrates how a CRT television works.
This animation explains how a plasma display television works.
Formic acid is the simplest carboxylic acid.
A liquid-crystal display utilises the light modulating properties of liquid crystals.
One of the oxoacids of nitrogen. Colourless, moderate acid with a pungent odour, that...