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wave gradient multicolor abstract fluid dynamic vibrant colorful energy motion flow smooth curvy sinuous undulating rolling swirling twirling vortices eddies whirlpools spirals helixes ripples waves breakers surges swells billows tidal ocean sea water liquid fluid gas plasma energy force power motion speed velocity acceleration momentum inertia gravity physics science nature universe cosmos galaxy stars planets moons comets asteroids black holes white holes wormholes time travel space travel alien life extraterrestrial UFOs flying saucers abduction Roswell Area 51 conspiracy theories government cover-ups secret societies the truth is out there