Ossetra Ossetra Ossetra (also Oscietra, Osetra, or Asetra) caviar is one of the most prized and expensive types of caviar (eclipsed in price only by Beluga caviar). It is obtained from the Ossetra sturgeon which weighs 50-400 pounds and can live up to 50 years. Ossetra caviar varies in color from deep brown to gold. Lighter varieties are more sought after, as they have the richest flavor and come from the oldest of sturgeon. Golden Ossetra is a rare form of Ossetra caviar, and is golden-yellow in color with a very rich flavor. The word Ossetra is the transcription of the
Hypothetical types of biochemistry Hypothetical types of biochemistry Hypothetical types of biochemistry are forms of biochemistry speculated to be scientifically viable but not proven to exist at this time. The kinds of living organisms currently known on Earth all use carbon compounds for basic structural and metabolic functions, water as a solvent, and DNA or RNA to define and control their form. If life exists on other planets or moons, it may be chemically similar; it is also possible that there are organisms with quite different chemistries—for instance, involving other classes of carbon compounds, compounds of another element, or another solvent in place of