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The planet Yavin made its first appearance in the original 1977 Star Wars film. The planet is shown in space during the approach of the Millennium Falcon spaceship as a large red gas giant planet; orbiting this planet, Yavin 4, the fourth moon, appears on screen as a green/blue-colored Earth-like world.
The Waldseemüller map, printed in 1507, depicted the New World in a new way—"surrounded on all sides by the ocean," in the words of an accompanying book—and named the continent for the ...
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Oct 9, 2023 · Genetic studies suggest that the first people to arrive in the Americas descend from an ancestral group of Ancient North Siberians and East Asians that mingled around 20,000 to 23,000...
- Creating A Continent
- Prehistory
- A Brief Respite
- Mountain Building
- Supercontinent!
- Birth of North America
- Building The West
- San Andreas Starts Up
The landmass called North America is actually pretty young, becoming something close to its current incarnation less than 200 million years ago. Before then, the continent was called Laurentia on its journey back and forth across the equator, as it joined and was separated from supercontinents. Over billions of years, whether Laurentia or North Ame...
The central core of present-day North America is its craton, the oldest, thickest part of the continent. While parts of the craton peek out in Greenland and Canada, in the U.S., thick layers of sedimentary rocks keep most of these ancient assemblages under wraps in the center of the continent. The rocks here are more than two billion years old in p...
By 542 million years ago, when complex life forms suddenly appear in the fossil record all across the planet, Laurentia was surrounded by ocean and passive margins on all sides. Like today's East Coast, a passive margin has no active collision or boundary between two of Earth's tectonic plates.
The continent's brief Cambrian respite ended in the Ordovician, when an island chain slammed into the East Coast, raising mountains from Greenland to Mississippi . At the time, the Appalachians were as tall and stunning as the Himalayas are today. A similar collision in the Southwest about 370 million years ago twisted rocks throughout what is now ...
The supercontinent Pangaeaincluded almost every giant landmass on Earth. As these pieces of continent crashed together 300 million years ago, mountains continued to rise along what is now the East Coast.
The Atlantic Ocean opened 200 million years ago, pushing North America westward. As the continent rifted away from the supercontinent Pangaea, it finally earned the name North America.
As the East Coast settled down into a passive margin, with no active tectonics, things were heating up in the West. The widening Atlantic Ocean pushed the continent over the Panthalassa Ocean, precursor to today's Pacific. Geoscientists debate the timing and position of subduction zones along western North America. Did it look like today's Andes or...
When North America gobbled up the boundary between the Farallon and Pacific oceanic plates, its western margin shifted from a subduction zone to a transform boundary. This marks the beginning of the San Andreas Fault, which moves side-by-side. With the sudden shutdown of the giant conveyor belt grinding against its margin, the continent relaxed, an...
Hiero Cock Excude. 1562, the map depicts the eastern coast of North America, all of Central and South America, and portions of the western coasts of Europe and Africa. While only a longitude scale appears, it is clear that the map covers an area bounded between 0° and 115° longitude west of Greenwich, and 57° north and 70° south latitude.
Nov 27, 2017 · In 1507, German cartographer Martin Waldseemüller created a map unlike any other ever drafted in Europe. To the west, across the Atlantic, his map included the coastlines that European voyagers...
Dec 23, 2013 · North and South America. This map, drawn in 1540 by by Sebastian Münster, was the very first printed map that called the great body of water to the west of the land by the name Pacific.
