mavii

Burns, MD of The Burns Archive. One of the major accomplishments during the Civil War was the establishment of an effective hospital system that threaded the wounded and diseased through a ...

If you are a Hackaday reader, you probably know what a Fresnel lens is. You find them in everything from overhead projectors to VR headsets. While it seems commonplace now, the Fresnel lens was an ...

Burns, MD of The Burns Archive. One of the major accomplishments during the Civil War was the establishment of an effective hospital system that threaded the wounded and diseased through a ...