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The new rule has made the competitors think more about concepts of beauty - and changed some opinions, like those of Laetitia Mouroufie.

He fondly remembers an experience with Laetitia Dosch, the French actress, writer and director.

The US artist will be joined by fellow torchbearers in Saint-Denis, including French actress Laetitia Casta and French rapper MC Solaar.

Laetitia Wilkins and her team from the at the Max Planck Institute for Marine Microbiology in Bremen, Germany, studies bacterial evolution in a very unique scenario: the Isthmus of Panama.

"This study improves our understanding of the ability of bacteria to respond to environmental changes, which leads us to think that bacterial communities may already be adapting to anthropogenic changes, such as the flow of excess nutrients from agricultural fields into coastal waters," group leader Laetitia Wilkins comments.