Hello, During last two weeks I habe been thinking about the smallest powered, sailling and paddling boats for one person seated in a very...
Shark skin is made of a matrix of tiny, hard, tooth-like structures called dermal denticles or placoid scales. These structures are shaped like...
Dear Sirs, My name is Luis Sarmento Cunha, I live in Francelos, V.N.Gaia, PORTUGAL close to Atlantic Sea. I have just created an innovative...