41.   In cyberspace, Ward learned of a technique called brachytherapy, in which radioactive seeds are implanted in the prostate to kill cancer cells.

42.   In tests on rodents, the drugs halted tumor growth without killing normal cells or causing toxic side effects.

43.   In the past, scientists could not kill cancerous cells without harming healthy ones, limiting the use of microwaves to skin tumors.

44.   In treating cancer, however, the aim is usually to kill cells.

45.   It could be used in combination with other drugs that would actually kill the cells, said Weinberg.

46.   It gives off fatal toxins that kill immune system cells.

47.   It is known that alcohol can indirectly kill brain cells.

48.   It is the point where more cells are killed than reproduce and the body starts to die.

49.   Isotopes can be attached to proteins and other compounds that guide them to cancerous targets where the radiation kills specific cells.

50.   It is possible that small silicone fragments might be converted by the body into compounds that kill cancer cells, Garrido said.