• Actually the most deadliest poison is in a spider that cannot harm you, because it cannot pierce your skin with it's teeth. It goes by the name of "daddy long legs."
  • Venom from a Troll.
  • I'm going to go with the venom of the Inland Taipan, which is the most poisonous snake in the world. It's venom is 650 - 850 times more toxic than that of a Western- or Eastern Diamondback (rattlesnake) and a single bite has enough venom to kill 100 adult humans....scary.
  • Steven Seagal movies.
  • Botulism bacteria
  • ricin made from castor bean.
  • Tetanospasmin, the toxin that causes tetanus, caused by certain anaerobic bacteria.
  • From what I remember thiopentone only takes 2 seconds to kill and plutonium is the most poisonous per volume.
  • botox from clostridium botulinum
  • I would guess the most poisonous substance by weight would be Polonium-210. A few years ago the Russian dissident, Alexander Litvinenko, was killed by Russian agents using approx 0.5 microgram = 0.0005 milligrams Po210. More info on the Litvinenko murder here: From the World Health Organization: "Po-210 emits alpha particles and is 5,000 times more radioactive than radium. The half-life of Po-210 is 138 days. Alpha radiation delivers a large amount of energy to living cells and can cause considerable damage and cell death. . . . "Health risk of Po-210 "Po-210 represents a radiation hazard only if taken into the body – by inhalation, ingestion, or getting into a wound. This “internal contamination” can cause irradiation of internal organs, which can result in serious medical symptoms or death. The toxicity of Po-210 is much higher than that of cyanides, for example. Nevertheless it does not represent a risk to human health as long as it remains outside the body."

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