SEAgel Aerogel lighter than air solid. Not a UFO

This is the lighter than air solid developed in the 1980s, based on agar, a derivative of seaweed. During manufacture, the internal foam space can be filled with a variety of gasses, including helium or hydrogen and the material is then shrink wrapped to prevent leakage. This example probably contains ordinary air. This video was recorded over a decade ago about 1997. Updated versions of the material are produced in huge quantities for military purposes. If you want explanations for triangular UFOs tha