10: Scorpion Venom br The notorious scorpion roams the desert sands and is well known for its dangerous bite. Though There are br br close to 2,000 scorpion species each species has specialized venom to suit its environment. Not many people br br though know how lucrative the venom can be. At close to $10,000 per litre it is one of the most expensive br br liquids on the planet. This is due to the obvious dangers of acquiring the venom, the rarity of the specimens br br and the medical uses of parts of the venom. In fact, Some of the toxins are immunosuppressants which are br br chemicals that suppress the immune system. These can help in diseases where the immune system is not br br functioning as it should and in the right doses, Scorpion venom toxins can help treat diseases such as br br multiple sclerosis. Interestingly scorpions are not prone to using their venom and would much rather catch br br prey with their claws due to the difficulty in creating it. However They will use the venom to escape larger br br predators and various situations they cannot flee from. Though often painful, scorpion bites are rarely fatal br br and many antivenoms have been made for the various types of scorpions in the United States alone. br 9: GHB br Known scientifically as Gamma Hydroxybutyric Acid, and non-scientifically as the ´Date Rape drug, GHB is a br br very interesting drug. As a drug it is a depressant, and therefore dampens the central nervous system. At br br $660 per litre, legitimate uses for GHB include treatment for narcolepsy, alcoholism and cataplexy. It is br br used illegitimately and most famously as a drug that especially when mixed with alcohol can cause rapid br br intoxication and sedation. Side-effects can even include memory loss after use. The rapid intoxication br br effects are sometimes used by teenagers for a powerful high, and users describe it having a salty or soapy br br taste. br 8: Mercury br This amazing liquid metal is also known as quicksilver and before its toxicity became widely feared, it was br br used in many devices around the world. The most popular were thermometers, thanks to its quick expansion br br during temperature changes. In fact some historians believe that The first emperor of China died after br br exposure to Mercury that was ironically supposed to give him eternal life. To ancient alchemists, mercury was br br a pure state from which other metals could be created by simply adding sulfur. Today however, mercury br br poisoning is a well documented occurrence and is actively avoided at all costs. Still, as an element, Mercury br br is particularly rare and exists only in small amounts within the Earth's crust. It is still used today in br br some kinds of electrical switches and some kinds of blood pressure monitors. The price? Around $900 per br br liter. br 7: Horseshoe Crab Blood br Though our human blood can look blue in our veins, that is only because our eyes see the blue light that has br br a different wavelength than red. Our blood is red in part thanks to the segment of our blood called br br hemoglobin, which is iron-rich and helps distribute oxygen to the cells. The living fossils that are br br Horseshoe Crabs don't have this. Instead they have something called Hemocyanin, which is copper-rich and br br makes their blood appear blue. This blue blood is highly valued at close to $16,000 per litre and has led to br br the creation of many harvesting farms. Most crabs survive, though Up to 30 may die depending on the br br harvesting center . The blood is so highly valued as the it contains specialized cells which are amazingly br br powerful at fighting bacteria. They are not only more effective than vaccines but much faster and Have helped br br horseshoe crabs survive for almost 450 million years. Unfortunately over harvesting is having an effect on br br crab populations, though vaccines are being developed that may save countless human lives. As we are learning br br to take the best of other species to improve our own we seem to be leaving some hurt animals in our wake. br 6: LSD br This is the Drug that would become synonymous with the sixties as a whole and the flagship of psychedelics. br br Also known as acid, LSD can provide vivid visual effects and hallucinations and was a popular recreational br br drug. A powerful and well-researched substance, It has been used by many pop-culture icons after its br br invention in 1938. It´s mental effects were discovered when it´s creator Swiss chemist, Albert Hoffman br br accidentally consumed a number of doses by licking his fingers after working with the chemical.