Inland Taipan (Oxyuranus microlepidotus)

Inhabiting the arid black-soil clay plains of central-eastern Australia, the Inland Taipan (also called the 'Fierce Snake') produces the most biochemically toxic venom of any terrestrial reptile. With a murine subcutaneous LD50 of 0.025 mg/kg, its venom contains oxylepitoxin, a devastating cocktail of presynaptic neurotoxins, procoagulants that cause blood to clot solidly in veins, and myotoxins that dissolve muscle tissue. The most toxic terrestrial venom known to biological science, capable of killing in under 45 minutes. Ranks #1 above the Box Jellyfish in absolute molecular toxicity: its 0.025 mg/kg LD50 is roughly 50 times more toxic than that of a common Indian Cobra, making it the uncontested pinnacle of evolutionary chemical weaponry.