fluctuation. noun change, shift, swing, variation, instability, alteration, wavering, oscillation, alternation, vacillation, unsteadiness, inconstancy Don't worry about tiny fluctuations in your weight.luctuation. noun change, shift, swing, variation, instability, alteration, wavering, oscillation, alternation, vacillation, unsteadiness, inconstancy Don't worry about tiny fluctuations in your weight.
Jim Starlin's Thanos first appeared in 1973; his 40th anniversary may be celebrated on set of The Avengers 2. (Marvel) http://herocomplex.latimes.com/movies/avengers-spoiler-special-mystery-villains-creator-speaks-out/attachment/thanos2_1336007796/.
View image of The Ediacarans were some of the first complex organisms (Credit: Ryan Somma, CC by 2.0). In fact, there is evidence that predators existed before the anomalocaridids. Animals first began to grow hard shells and exoskeletons about 550 million years ago.