because it has venom that is so strong that it can kill over
250,000 mice
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Lava (or any molten rock or metal). But strong acids or bases
can be deadly (e.g. hydrochloric acid, ammonia) as can various
poisons and venoms.
But the one that kills the most people annually is water.
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Most venoms, if ingested, are simply disabled by the acid in the
stomach, then digested. Of course, if a person has a sore or cut in
the mouth, it could be deadly!