Baghdad vs Boulder

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Baghdad (; Arabic: بَغْدَاد‎ [baɣˈdaːd] (listen)) is the capital of Iraq and one of the largest cities in the Arab world, and compared to its large population it has a small area at just 673 square kilometers. Located along the Tigris, near the ruins of the Akkadian city of Babylon and the ancient Iranian capital of Ctesiphon, Baghdad was founded in the 8th century and became the capital of the Abbasid Caliphate. Within a short time, Baghdad evolved into a significant cultural, commercial, and intellectual center of the Muslim world. This, in addition to housing several key academic institutions, including the House of Wisdom, as well as hosting a multiethnic and multireligious environment, garnered the city a worldwide reputation as the "Centre of Learning". Baghdad was the largest city in the world for much of the Abbasid era during the Islamic Golden Age, peaking at a population of more than a million. The city was largely destroyed at the hands of the Mongol Empire in 1258, resulting in a decline that would linger through many centuries due to frequent plagues and multiple successive empires.

With the recognition of Iraq as an independent state (formerly the British Mandate of Mesopotamia) in 1932, Baghdad gradually regained some of its former prominence as a significant center of Arabic culture, with a population variously estimated at 6 or over 7 million.In contemporary times, the city has often faced severe infrastructural damage, most recently due to the United States-led 2003 invasion of Iraq, and the subsequent Iraq War that lasted until December 2011. In recent years, the city has been frequently subjected to insurgent attacks, resulting in a substantial loss of cultural heritage and historical artifacts as well. As of 2018, Baghdad was listed as one of the least hospitable places to live, ranked by Mercer as the world's worst major city for quality of life.

Source: Wikipedia

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In geology, a boulder is a rock fragment with size greater than 256 millimetres (10.1 in) in diameter. Smaller pieces are called cobbles and pebbles. While a boulder may be small enough to move or roll manually, others are extremely massive. In common usage, a boulder is too large for a person to move. Smaller boulders are usually just called rocks (American English) or stones (In British English a rock is larger than a boulder). The word boulder is short for boulder stone, from Middle English bulderston or Swedish bullersten.In places covered by ice sheets during Ice Ages, such as Scandinavia, northern North America, and Siberia, glacial erratics are common. Erratics are boulders picked up by ice sheets during their advance, and deposited when they melt.

They are called "erratic" because they typically are of a different rock type than the bedrock on which they are deposited. One of them is used as the pedestal of the Bronze Horseman in Saint Petersburg, Russia. Some noted rock formations involve giant boulders exposed by erosion, such as the Devil's Marbles in Australia's Northern Territory, the Horeke basalts in New Zealand, where an entire valley contains only boulders, and The Baths on the island of Virgin Gorda in the British Virgin Islands. Boulder-sized clasts are found in some sedimentary rocks, such as coarse conglomerate and boulder clay. The climbing of large boulders is called bouldering.

Source: Wikipedia