An island or isle is any piece of sub-continental land that is surrounded by water. It is believed that there are over 100,000 islands in the world. It’s difficult to put a figure to the exact number as there are different kinds of them in various water bodies including oceans, seas, lakes, and rivers. There is even an island within a lake that is situated on an island located in a lake on an island. Only 322 of them are larger than 1000 km2 (386 sq mi). Here are the top 18 largest islands on Earth. Why 18? Because this is the number of islands that have a land area of greater than 100,000 square kilometers (38,610 square miles).
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I stumbled upon an amazing web page showing what did ancient Earth look like. On “Dinosaur Pictures and Facts” web page (dinosaurpictures.org), there’s also an interactive animation. On this page, you can either select the years (i.e. 600 million years ago) or jump to a particular event (i.e. first multicellular life) and see how ancient Earth did look like then. You can also remove the clouds and stop the Earth’s rotation if you want to.
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Earth’s outer shell is divided into multiple plates that slowly glide over the mantle. The movement of these plates slowly changes Earth’s surface over time by merging, or separating, continents. 250 million years from now, consistent with the supercontinent cycleNotes 1, there will be a possible future supercontinent called Pangaea Ultima. Hypothesized by Christopher Scotese, a geologist at the University of Texas at Arlington, Pangaea Ultima earned its name from its similarity to the previous Pangaea supercontinent, which was formed about 335 million years ago, and began to break apart about 175 million years ago. Here is a beautiful video published by the Tech Insider channel showing the formation of this supercontinent.
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Despite its unusual and a bit weird look, the AuthaGraph World Map may be the most accurate world map ever. It is created by the Japan artist and architect Hajime Narukawa, and won the Good Design Grand award in 2016.
Since the 16th century, we use Mercator Projection in most maps we used to seeing pinned on classroom walls and in Atlases – a cylindrical map projection presented by the Flemish geographer and cartographer Gerardus Mercator (5 March 1512 – 2 December 1594) in 1569. It is very useful for ocean navigation since it preserves “true compass bearings between any two points”. But, it greatly distorts the shape of the lands. The closer the land to the poles of the Earth, the bigger it looks. For example, Greenland looks almost as big as Africa on a world map using Mercator projection, but actually, Africa is 14 times bigger than Greenland. Another example; Canada looks way bigger than the continental United States, but in fact, it is only about 1.2 times bigger.
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Have you ever wondered what would Antarctica look like if all its ice melted? This may seem extraordinary and unlikely, but, this has actually happened in the past. In fact, there have been no major ice sheets over the South Pole for most of the Earth’s history.
In the video below, NASA Goddard strip away Antarctic ice to reveal a new, and much more detailed map of the bedrock below. This map, called Bedmap2, was compiled by the British Antarctic Survey and incorporates millions of new measurements, including substantial data sets from NASA’s ICESat satellite and an airborne mission called Operation IceBridge.
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In 240 BC, the Greek astronomer, geographer, mathematician, music theorist and librarian Eratosthenes of Cyrene (c. 276 BC – c. 195/194 BC) calculated the circumference of the Earth without even leaving Egypt. Here’s how:
Eratosthenes knew that at local noon on the summer solstice (at the time of the longest day, about 21 June in the northern hemisphere) in Syene (modern Aswan, Egypt), the Sun was directly overhead – Syene was in fact slightly north of the tropic, though (1). Local noon is – technically when the sub-solar point is somewhere over your meridian, it’s noon for you. So, on that day, Syene is the sub-solar point of Earth (the sub-solar point on a planet is where its sun is perceived to be directly overhead). To learn more about the local noon and the subsolar point, see the article titled “How Earth Moves“.
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The Earth, our home has a lot of beautiful, amazing locations – and some strange places as well. These weird places sometimes look “impossible”, sometimes dangerous, sometimes scary, but despite all that, still can be beautiful. Here are ten of them.
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When I was a child, one of my favorite books was (and still is) Jules Verne’s Around the World in Eighty Days. Published in 1873, the novel tells the story of Phileas Fogg, an English gentleman, and his newly employed French valet Passepartout. Fogg is a member of the Reform Club, a private members club on the south side of Pall Mall in central London. While the club members talking about the recent advances in technology, especially the new transportation methods including railway, Fogg sees an article in The Daily Telegraph stating that “with the opening of a new railway section in India, it is now possible to travel around the world in 80 days”. Other club members are skeptical about this claim. But Fogg insists it is doable.
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Earth, the blue planet: the oceans combined with the atmosphere makes the planet look blue. So its color mainly comes from water. About 71% of the Earth’s surface is covered with water, in fact, Earth is still the only planet we know where water can exist in liquid form on the surface. Water is also vital for all known forms of life. But there are numerous places on Earth that receive rainfall less than even 0.76 mm annually. One place even receives absolutely no rainfall. Here are the top ten driest places on Earth.
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An amazing video published on youtube by National Geographic. How deep is the ocean (on average) and the Mariana Trench, the deepest part of the world’s oceans?
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