Tabletop photography by "Studiocommunity e.V." (incorporated association). No photomontage was used. All objects were fastened on the board, which was pushed from the side, whereby the wine spilled out of the glass. The carafe is filled with wine coloured gelatine. (POTD)
Radiometer. The Crookes radiometer, also known as the light mill or solar engine, consists of an airtight glass bulb, containing a partial vacuum. Inside are a set of vanes which are mounted on a spindle. The vanes rotate when exposed to light. (POTD)
GIF-animation showing a moving echocardiogram; a 3D-loop of a heart viewed from the apex, with the apical part of the ventricles removed and the mitral valve clearly visible. Due to missing data the leaflet of the tricuspid and aortic valve is not clearly visible, but the openings are. To the left are two standard two-dimensional views taken from the 3D dataset. (POTD)