71.   The females may be opting for the males who can fight best, the researchers suggest.

72.   The researchers suggest that lekking may have an evolutionary basis.

73.   The researchers suggest that seismic waves from a far-off earthquake could increase the pressure within the chamber enough to make the volcano blow its top prematurely.

74.   The researchers suggest that similar materials beyond those that they studied may also be radiation resistant.

75.   The researchers suggest that the ability to ingest bacteria may be a strategy by which plankton adapt to grow in iron-poor seas.

76.   The researchers suggest that the problem stems from damage to mitochondria, which generate energy for cells.

77.   The researchers suggest that this enhances the sense of smell.

78.   The researchers suggested that in any system where it was possible to know about a calculation error it might be possible to exploit this newly discovered vulnerability.

79.   The researchers suggested that it could be the content of the conversations, rather than simply being on the phone, that accounts for the increased risk.

80.   The researchers suggested that longer studies might find even larger problems.