John Curtin served as the 14th Prime Minister of Australia and played an important role in leading the country through the challenges of the World War II. He was a member of the Australian Labor Party and served as Prime Minister from 1941 until his death in 1945.

The first successful human-to-human heart transplant was performed by Dr. Christiaan Barnard in Cape Town, South Africa, on December 3, 1967. The patient, Louis Washkansky, received the heart of a young woman who had died in a car accident.

Arcades are a common architectural feature where a series of arches are supported by columns or pillars. This technique has been used for centuries in various architectural styles, from ancient Roman aqueducts to medieval cloisters and modern shopping malls. Arcades provide a covered walkway while allowing light and air to pass through the openings between the arches.

The Lighthouse of Alexandria, also known as the Pharos of Alexandria, was one of the Seven Wonders of the Ancient World. It stood on the small island of Pharos, guiding sailors safely into the busy harbor of Alexandria, which was one of the most important cities of ancient times. The structure was completed around the 3rd century BC and was one of the tallest man-made structures for many centuries.

The Greek letter Pi (π) is roughly equal to 3.14159 and is commonly used in mathematics to represent the ratio of the circumference of a circle to its diameter. Pi is an irrational number, meaning it cannot be expressed as a simple fraction and its decimal representation never ends or repeats.

The QWERTY keyboard layout, which is the most commonly used layout in English-speaking countries, is arranged so that the letter D is directly below the E. The term "QWERTY" comes from the first six letters in the top row of letters.

The first iPad was released on April 3, 2010. It marked the beginning of a new category of devices for Apple and helped define the tablet computer market. Since then, iPads have become a significant part of Apple's product lineup with multiple iterations and updates.

Winston Smith is the protagonist of George Orwell's dystopian novel 1984, published in 1949. The novel depicts a totalitarian society ruled by the omnipresent Big Brother, where individualism and independent thinking are persecuted as "thoughtcrimes".

The Sahara Desert is located in North Africa and is the third largest desert overall after Antarctica and the Arctic, which are both cold deserts.

Although Apple's iPhone is often credited with revolutionizing the smartphone industry, the first smartphone was actually created by IBM and was called the "Simon Personal Communicator." It was released in 1994, more than a decade before the first iPhone.