The cowrie is the most widely and longest used currency in history. 1,000 BC: First Metal Money and Coins Bronze and Copper cowrie imitations were manufactured by China at the end of the Stone Age ...

Jan. 22, 2025 at 9 p.m. on KPBS TV / PBS app + Encore Sunday, Jan. 26 at 9 p.m. on KPBS 2. Unidentified Flying Objects have long captivated the imagination of the public, but for decades most ...

Math nerds are the most dangerous people on the planet,” muses NSA agent Taylah Sanders (Quintessa Swindell), who spends her ...