A cuboid is a polyhedron with six rectangular faces.
Deinonychus antirrhopus, the 'terrible claw', was a carnivorous dromaeosaurid dinosaur.
Addition is a reaction in which the molecules of two or more substances unite without the formation of a by-product.
Ammonium chloride is the result of the reaction of ammonia and hydrogen chloride
A sphere is the set of points which are all within the same distance from a given point in space.
The dissolution of zinc in hydrochloric acid produces hydrogen gas.
The solution of hydrogen chloride in water is called hydrochloric acid.
Knallgas is the mixture of hydrogen and oxygen. It will explode when ignited.
Common salt is dissolved by water: polar water molecules form a coat around the ions.
During freezing hydrogen bonds are formed between water molecules resulting in a crystal structure.
Polymerised ethylene is known as polyethylene, a type of plastic.
Emperor Franz Joseph I and the beautiful Elisabeth got married in Vienna in 1854, but their marriage was unfortunately an unhappy one.
This animation demonstrates various types of cylindrical solids as well as their lateral surfaces.
An important endocrine gland producing hormones that affect metabolism and the calcium balance of the body.
During the evolution of vertebrates the relative development of brain areas has changed.
A mobile, nuclear-capable ballistic missile developed at the end of the Cold War.
Ancient Egypt was called the ‘gift of the Nile’, since the river played an important role in the rise of Egyptian civilisation.
The Apache attack helicopter, named after an American Indian tribe, was developed for the United States Army.
Static warfare was one of the characteristics of WWI
The German liquid-propellant rocket, developed during WWII, was the first known man-made object to reach space.