Of all the poisons man has concocted to combat his insect and rodent enemies, thallium sulfate is one of the most potent. Vermin can hardly stay away from it; they go right on nibbling baits ...

OSAKA--Thallium was detected in the comatose aunt of a man detained on suspicion of using the highly toxic substance to kill a female acquaintance, police said. Just 1 gram of thallium is enough ...