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Liu Pengli of China (144 BC) could be the firt serial killer in history.
by discovering the world's first antibiotic, or bacteria killer
monkeys, although they were not human.
Jeff the killer is not human he isn't real people think they have seen him but, there is no complete proof.
"killer dolphin" is not a recognized name for a species.
burn the coal in night, is a painless killer (human killer)
human tigers
if ingested it can
This question requires a subjective answer. The deadliest killer in human history was the Black Plague which wiped out millions of people in Europe.
A killer whales predator is a human cause they hunt them for blubber
The first human prophet was Enoch.
yes