The Japanese Space Agency (JAXA) and former NASA Goddard Planetary scientist Dr. James O’Donoghue (@physicsJ) created another amazing video. He showed that what if we slowly drain the Earth’s oceans and see the two-thirds of Earth’s surface (that is currently under the oceans) we don’t get to see. In other words, how our planet would look without water (spoiler: it definitely wouldn’t look like this).
The animation highlights the world’s longest mountain range, the Mid-Ocean Ridge (see notes 1 below), and the ice-age land bridges that ancient humans crossed, like the land bridge known as Beringia which became the Bering Strait after the ocean levels rose following the end of the last ice age.
For example, if the sea levels were just 50 meters (164 feet) lower, you could walk between France and England.
The mid-ocean ridges of the world are connected and form the Ocean Ridge, a single global mid-oceanic ridge system that is part of every ocean, making it the longest mountain range in the world. The continuous mountain range is 65,000 km (40,400 mi) long (more than nine times longer than South America’s Andes, the longest continental mountain range, which is 7,000 km / 4,300 mi long), and the total length of the oceanic ridge system is 80,000 km (49,700 mi) long.
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