micro-metamaterials | scienceinfo.net

Fabrication of new materials is lighter than aerogels, which is 10,000 times harder
In the past, scientists have successfully fabricated metamaterials heavier than air three times as hard as steel, known as aerogels.
3D printing materials suitable for aircraft and super light and hard car
Researchers have developed a material with a different ruler size and features lightweight, hard and robust - that can be used in 3D printing.