Burs, bristled with hooks ingeniously shaped to grasp at fur and cloth, inspired Swiss engineer George de Mestral to invent the fastening material Velcro.
Burs, bristled with hooks ingeniously shaped to grasp at fur and cloth, inspired Swiss engineer George de Mestral to invent the fastening material Velcro.
Burs, bristled with hooks ingeniously shaped to grasp at fur and cloth, inspired Swiss engineer George de Mestral to invent the fastening material Velcro.