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This week at STEMx, we have compiled a list of short videos to deepen your knowledge on a variety of subjects. We encourage all readers to comment and like.
Who made these circles in the Sahara? Very few people know of the circles in the Sahara and of those who have heard about them, few know what they are. Here is the video's description: "Deep in the Sahara, far from any towns, roads, or other signs of life, is a row of markings in the sand. There are dozens of them stretching for miles in a straight line in central Algeria, each consisting of a central point surrounded by a circle of 12 nodes, like numbers on a clock. And when we started making this video, no one seemed to know what they were.
We first saw the circles back in September 2021, after finding a Reddit post on r/WhatIsThis with coordinates asking what the circles could be. With just two upvotes and two commenters, it wasn’t exactly a lively discussion. But seeing the circles themselves on Google Earth was fascinating: They were eerily perfect in their shape and regularity, but so deeply isolated in the desert. We were hooked on finding an answer.
So we decided to make a video out of trying to solve the mystery, no matter where it took us. We documented every step of the process — from Zoom calls and web browser screen recordings to vlogs and field shoots — to show the reporting process from the inside out. And when we maxed out what we could learn on the internet, we handed over this story to a team in Algeria to take it all the way. "
Refraction Analogy with a Real Car - GCSE and A Level Physics To those who have taken a Physics class, this subject will sound familiar. However, they may have never seen the effect in real life. Here is the video's description: "You have probably heard of this refraction analogy for how light behaves as it refracts and changes direction at a boundary - now see it in real life! Notes for teachers:
Scene 1 - A car will travel slower over a rough surface, like gravel, compared to a smooth surface like tarmac.
Scene 2 - If a car drives from one surface to another with the front wheels meeting this new rougher surface at the same time, the car will slow down but not change direction.
Scene 3 - If the car meets a surface at an angle then one wheel slows down before the other and the car turns. Once both wheels are on the gravel then it continues in a straight line until it turns again as it drives back onto the tarmac.
Scene 4 - A repeat of Scene 3."
Skyscraper at Sea: Building the Amazing Appomattox Previously, STEMx shared some online resources about underwater constructions. One of the most unique water buildings is the Appomattox. This video discusses the construction of the platform, the installation, and its capacities. Here is the video's description: "Learn how a massive oil platform is designed and built to last 40 years in the harsh elements of the Gulf of Mexico. This amazing structure took thousands of workers years to construct and stands at an impressive sixteen stories in height, truly making it a skyscraper in the sea."
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