1.   On the one hand, ricin is an untraceable biological weapon that is twice as deadly as cobra venom, though not as lethal as botulism.

2.   An FBI chemist testified that ricin is the third most toxic substance known, after plutonium and botulism, and twice as lethal as the deadliest cobra venom.

3.   He was confident that cobra venom held the secret to curing or maybe even preventing disease.

4.   Ricin is twice as deadly as cobra venom.

5.   Thai police hunt cobra-venom syringe attaethal cobra venom as she napped in her car, a report said Saturday.