51.   Doctors said the possibility exists of interference with a cell phone, so patients are advised to use the phones on the ear opposite the implant.

52.   Evidence also exists of more primitive humanlike creatures on all three continents.

53.   He said that until there is a party to challenge the ANC at the polls, the risk exists of South Africa drifting into a one-party state.

54.   Mitrovica said that all the ice from the last ice age is gone from Scandinavia, but traces still exist of ancient ice in Canada.

55.   No reliable count exists of the number of prisoners of conscience, but foreign human rights groups generally agree that the number has fallen in recent years.

56.   Sufficient scientific evidence exists of its danger to humans and animals to justify a global ban on DDT, the World Wildlife Fund said in a report Wednesday.

57.   Some scientists believe that if this is true, then the possibility exists of life there.

58.   These rules exist outside of us.

59.   Veterans groups and members of Congress have been deeply skeptical of U.S. Defense Department claims that evidence does not exist of chemical or biological weapons use.

60.   But in a warning against complacency, he said the risk still existed of another five years of Conservative rule.