Evolution of the Prominence from 09:06 UT, August 07, 2012 to 02:06 UT, August 08, 2012 in SDO_AIA and Stereo_A-EUVI. Left panels: composite images of 304 Å, 171 Å, and 193 Å wavelength from SDO/AIA. Right panels: 304 Å wavelength of Stereo_A-EUVI. The white arrows in the top four frames, marked with and show the locations of prominence footpoints in both spacecrafts. White dashed-curved lines indicate approximate boundaries of prominence, while the white doted curved lines on right lower middle panel show the trajectory of coronal rain. The brightening is marked with point for identifying areas of interest.