(Laughter) OK, so it is absolutely surprising that we know as much as we do know today about our ancestors, because it's incredibly difficult, A, for these things to become -- to be -- preserved, and secondly, for them to have been brought back up to the surface.
(Risos) Na verdade, é surpreendente que saibamos tanta coisa sobre os nossos antepassados porque é extremamente difícil primeiro, que estes elementos se tenham preservado e segundo, que eles voltem à superfície da terra.