What is gunpowder, who first made it, and how did China turn a quest for immortality into the world’s first explosive weapons ...

One of history’s greatest accidents changed the world forever. What began as a Chinese search for immortality ended in the ...

Roman, Egyptian, and Chinese civilizations had many different ingenious inventions. Chocolate was a big aphrodisiac for Mesoamerican civilizations and used for energy. The first earthquake detector is ...