kamiokande neutrino detector water photomultiplier tubes scientists reflection2010 x 1200, 1047 kB
in the number series string pi mathematics1920 x 1080, 1184 kB
purple flower1920 x 1280, 676 kB
space1920 x 1200, 1225 kB
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grille metal holes1920 x 1209, 610 kB
net mystery temptation1920 x 1200, 213 kB
abstract mosaic squares patterns abstraction puzzles 2560x16001920 x 1200, 386 kB
fabric brown pattern1920 x 1080, 917 kB
water drops black1920 x 1200, 405 kB
drops grass without color1920 x 1200, 392 kB
grass light point1920 x 1200, 390 kB
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