Read about the geology and history of Mount Vesuvius in Italy, how it was formed, its destruction of Pompeii and Herculaneum in AD 79, the next eruption in 1944, and what it is like today.

Explains how a wedge works, the formula for calculating its mechanical advantage, and some common applications of wedges.

Describes the refrigerator invented by Einstein and many of his discoveries in physics.

Provides information about Isaac Newton, his accomplishments, his views on religion, and some interesting facts about him.

Explains what a screw is, its history, the formula for calculating its mechanical advantage, the many types of screws in use, and some applications of screws today.

Explains what a lever is, its history, how it works, the formula for calculating its mechanical advantage, classes of levers, and uses of levers.

Describes some history of the wheel and axle, how it works, the formula for calculating its mechanical advantage, and some applications of the wheel and axle.

Describes some history of the pulley, how it works, the formula for calculating its mechanical advantage, types of pulley systems, and some applications of pulleys.

An ebook (with some embedded ads) that describes the characteristics and behavior of hurricanes, which are really the same phenomenon as typhoons and cyclones, and the damage caused by them.

Provides descriptions of many well-known innovations that were invented in the 1920s.

Explains different types of volcanoes and provides brief descriptions of active volcanoes around the world, including their histories of volcanic eruptions.

Gives examples of chemical interactions occurring in the human body, in the world around us, in foods, and in products we use.

Describes famous hurricanes that have struck in the Northern Hemisphere since 1900, the regions affected, the intensity of the storms, and the extent of damage each caused. The hurricanes are organized in sequential order.

Learn what formaldehyde is and what its many uses are. Explains how it is synthesized and provides a set of quick facts.

A detailed explanation of the Higgs Boson particle and the science of particle physics. Discusses the history of the search for this particle, the ongoing research with the Large Hadron Collider at CERN in Europe, and what is known so...

Presents a list of over two dozen Australian scientists along with their accomplishments.

Provides a good description of the characteristics of cumulus clouds.

Describes the different periods, epochs, and stages of the Cenozoic Era and the events that took place in them. Looks at geology and tectonic plate movements, climate, flora and fauna, and the emergence of mammals as the dominant life...

Explains what polystyrene is and its many different properties and uses.

Provides descriptions of the many different areas that can be focused on within the subject of chemistry.

Describes the main branches of physics and sub-divisions within each. Each section includes significant discoveries and recommended reference books.

A long list of famous inventors with some biographical information and descriptions of their inventions.

A list of famous physicists with some biographical information and mention of their accomplishments. Includes separate list of physicists who won the Nobel Prize.

Explains what ribose and deoxyribose are, their chemical structure and properties, similarities and differences, their functions, and their biological importance.