When were the mountains of Wales pushed up?
It was well before the dinosaurs roamed the earth. And it happened in the aftermath of a gigantic continental collision, when England and Wales (then attached to southern Newfoundland) crashed into Scotland (then attached to north America). The muds of the sea floor were converted, then, into the hard grey slates of the Welsh hills.
Until now it has been very hard to tell exactly when these slates were formed, because the minerals that make up the slates have been just too tiny for scientists to be able to separate out and measure their age.
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For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
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Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
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