Peter Hochuli and Susanne Feist-Burkhardt from Paleontological Institute and Museum, University of Zurich, studied two drilling cores from Weiach and Leuggern, northern Switzerland, and found pollen grains that resemble fossil pollen from the earliest known flowering plants. With Confocal Laser Scanning Microscopy, they obtained high-resolution images across three dimensions of six different types of pollen.
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