Scanning Electron Microscope picture of isolated, and well preserved Spherule from NE-Mexico (400 µm in diameter). A new study of melted rock ejected far from the Yucatan's Chicxulub impact crater bolsters the idea that the famed impact was too early to have caused the mass extinction that killed the dinosaurs 65 million years ago. A careful geochemical fingerprinting of glass spherules found in m