Study of wild sheep in Norway suggests climate change making them smaller . Authors of books suggest that climate change can override natural selection . `` Our findings have solved a paradox that has tormented biologists for years -- why predictions did not match observation . Wild European sheep in remote Outer Hebrides closely studied since 1990s .
Study of wild sheep in Norway suggests climate change making them smaller . Authors of books suggest that climate change can override natural selection . Wild European sheep in remote Outer Hebrides closely studied since 1990s .