The photo above is the closest humanity has ever come to creating Medusa.
If you were to look at this, you would die instantly. End of story.
The image is of a reactor core lava formation in the basement of the Chernobyl nuclear plant. It’s called the Elephant’s Foot and weighs hundreds of tons, but is only a couple meters across.
Oh, and regarding the Medusa thing? This picture was taken through a mirror around the corner of the hallway. Because the wheeled camera they sent up to take pictures of it was destroyed by the radiation.