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The rolling sand dunes of Mars. Credit: NASA/JPL-Caltech/MSSS
How the desert Is taking over Dubai and Abu Dhabi [read more: buff.ly/2sCSDDO]
Kompsat-2 satellite captured this magnificent image over the sand seas of the Namib Desert in 2012. The blue and white area is the dry river bed of the Tsauchab. Black dots of vegetation are concentrated close to the river’s main route [read more: buff.ly/2r4vGcD]
Bagnold would have felt at home by looking at these beautiful landscapes on Mars. These dunes are the only Martians we have so far come to see 🙂
Bagnold would have felt at home by looking at these beautiful landscapes on Mars. These dunes are the only Martians we have so far come to see 🙂
This Blender animation shows how the addition of a dissipative element in a seawall, improves the wave energy dissipation and the rejection of the waves back to the sea [source, full video by ChargedCapacitor: buff.ly/2Dc9iDe] [more: buff.ly/2QFxgyC]
Frozen, sculpted sand along the Lake Michigan shoreline in St. Joseph. The shapes emerge when strong winds erode the frozen sand. Photos taken on January 8, 2022. 📷Photo by Terri Abbott [source: buff.ly/3JWLdl2]
Chladni plates are an excellent tools for visualizing resonant patterns in two dimensions. This video by Saint Mary's University, Halifax, focuses on them [full video + theory + experiment setup: buff.ly/3uayZwL]
In agriculture, a terrace is a piece of sloped plane that has been cut into a series of successively receding flat surfaces or platforms, which resemble steps. It prevents erosion, benefiting the ecosystem while providing a livelihood for farmers buff.ly/2JL7h5H
The largest underground nuclear test conducted by the United States, Project Cannikin. It consisted of a 5 megaton-yield thermonuclear bomb, detonated in a 15-meter diameter chamber, at the bottom of a 1,790-meter shaft. It looks like gravity is cancelled ow.ly/HXS530nY2si
It’s been raining for days on end in Ouro Preto. Here’s drone images of a landslide that destroyed a historic building. Source of video unknown (DM me for credits)
An exact solution for the random close packing problem in 2D and 3D sciencex.com/news/2022-01-e… via @sciencex_com
The Galton board: 3000 steel balls fall through 12 levels of branching paths and end up matching a bell curve distribution. Each ball has a 50% chance of following each branch such that the balls are distributed by the mathematical binomial distribution buff.ly/35vud3j
The higher the temperature of a substance, the greater the kinetic energy of the particles. This animation by tec-science.com illustrates the influence of temperature on particle motion and thermal expansion [source, read more: buff.ly/3rmWPoT]
Reynisfjara Beach is the most famous black sanded beach in Iceland and one of the most well-known in the whole world. Reynisdrangar is the name given to the freestanding basalt columns which stand off the coast of Reynisfjara [read more: ow.ly/7FHj30nYYX4]
This glassy and free of debris structure is what an underside of an iceberg looks like [photos by Alex Cornell, read more: bit.ly/1Jd9woZ]
Can you believe such a big amount of lava can flow this fast? This iconic video captured by photographer Ken Boyer shows Kilauea's fissure 8 on June 16, 2018. No, it has not been sped up and this is the most stunning detail [full video: buff.ly/2LVOL8k]
The British Museum has a 3700+ year old clay tablet that is the world's oldest known complaint letter. 1750 BC problems. [read more: buff.ly/2JqqEhE]
How this machine, with the help of two people, easily replaces a railroad tie [full video: buff.ly/2UApZPN]
The spectacular secret treasures that have been growing beneath Mexico for 500,000 years: a cave with crystals up to 11 meters in lenght and a weight up to 55 tons [read more: buff.ly/2eDzOH5]
Beach cusps are shoreline formations made up of various grades of sediment in an arc pattern. The horns are made up of coarser material and the embayment contains finer sediment buff.ly/2td2akk [photo, Mazunte Oaxaca, Mexico (by Emmet Sparling: emmettsparling.com]

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