Nanodiamonds are not a mammoth’s best friend

Nor a Clovis indian’s, either. Nanodiamonds are teeny tiny invisible-to-the-naked-eye fragments of diamonds created by enormously high pressure and heat. Researchers have found thin layers of them all over North America right at the 13,000 year old level, which is when a global cooling period called the Younger Dryas began, extinguishing the human and large …