You yourself said your father was concerned about the moral implications of creating such a deadly substance.

Braun had been given a relatively small container of the deadliest available radioactive substance on Earth.

Filled you were with deadly substances," he said, "from being struck by seeds.

And I was working with botulinum, which is one of the deadliest substances on earth.

They attack the nervous system, they say they're the most deadly substances known to man.

The corporal's arms were eaten off to the shoulders and the deadly substance was working in toward the vital parts of his body.

He shook his head slowly and made a mental note to question Danica on how she had overcome the deadly substance.

To his horror, the levels of deadly substances were 80 times greater than the maximum safe concentration.

First and foremost, plutonium is without question the deadliest substance known.

Also uncertain, he said, was whether any had given their permission to become human guinea pigs in medical experiments with the deadly substances.