Large Aztec biface 24 1/4 inches long. This extraordinarily large biface is one of the most skillfully made examples in the world and is a testimony to the highly skilled Aztec "flint smiths" of Pre-Columbian Mexico. There are no more than a handful of flintknappers today that would be able to duplicate this large ceremonial knife. But the difficultly today, just as it must have been for the Aztec craftsmen, was the availability of material big enough to make bifaces this large.
A new scientific breakthrough points to a new way of treating the Hepatitis C virus, which infects 170 million people worldwide. Researchers at the University of Florida have created nanorobots that can attack the very mechanism of viral replication. It acts on a cellular level as a tiny particle destroys the mechanism that reproduces the proteins related to the disease.
May 30, 1898: Krypton Discovered, Decades Before Superman Arrives