| scientist say | 2.04 | But scientists say that cannot be ruled out. | ||
| scientist hope | 1.18 | Scientists hope that will change this year. | ||
| scientist report | 1.18 | Without the protein, scientists report, the mice develop gastric tumors. | ||
| scientist point | 0.46 | And where there is heat and liquid water, scientists point out, life in some form might thrive. | ||
| scientist fear | 0.39 | Top climate scientist fears repeat of ozone scenario. | ||
| scientist worry | 0.26 | Scientists worry the noise will change their feeding and breeding habits. |