New uses for scorpion and spider venom

Mad Bioscience: Radioactive Venom Lengthens Lives, Promotes Tumescence

The scorpion Leiurus quinquestriatus lives in the Middle East
and among the powerful cocktail of neurotoxins packed into its venom is
a peptide that is non-toxic to humans but binds to tumour cells.

In laboratory experiments, the peptide has invaded tumours in
breast, skin, brain and lung tissue, but left healthy cells untouched.

"It's as if the tumours collect it," Michael Egan of the company
TransMolecular in Cambridge, Massachusetts, told the New Scientist.