The presence of diamonds in an outcrop atop an unrealized gold deposit in Canada’s Far North mirrors the association found above the world’s richest gold mine, according to University of Alberta research that fills in blanks about the thermal conditions of Earth’s crust three billion years ago.
“The diamonds we have found so far are small and not economic, but they occur in ancient sediments that are an exact analog of the world’s biggest gold deposit — the Witwatersrand Goldfields of South Africa, which has produced more than 40 per cent of the gold ever mined on Earth,” said Graham Pearson, researcher in the Faculty of Science and Canada Excellence Research Chair Laureate in Arctic Resources.
“Diamonds and gold are very strange bedfellows. They hardly ever appear in the same rock, so this new find may help to sweeten the attractiveness of the original gold discovery if we can find
Scientists have challenged a popular theory behind the evolution of similar traits in island lizards, in a study published recently in eLife.
The findings in Greater Antillean Anolis lizards provide insights on why creatures often evolve similar physical features independently when living in similar habitats. They suggest that the role of developmental plasticity in shaping adaptive evolution may be less important than commonly thought.
Developmental plasticity refers to how development responds to the environment, in particular the way that an organism’s genetic constitution (or genotype) interacts with its environment during development to produce a particular set of characteristics (or phenotype).
“Anolis lizards that live on all four of the Greater Antillean islands have independently and repeatedly evolved six different body types for maneuvering through their given habitat,” says lead author Nathalie Feiner, Researcher at the Department of Biology, Lund University, Sweden. “As a result, they make a great model