1.   Our findings suggest an explanation.

2.   Petrey outlines the main areas of disagreement and suggests an explanation for the differences between the two schools.

3.   Geology suggests another explanation.

4.   Many different explanations have been suggested.

5.   Over the years, other explanations have been suggested.

6.   Researchers suggested elaborate explanations as to how the virus might kill T cells indirectly.

7.   Several explanations have been suggested for the existence of imprinted genes but the neatest is one proposed by Dr. David Haig, an evolutionary biologist at Harvard University.

8.   The name suggests an explanation, and Carner laughs.

9.   Annan suggested other explanations.