From a random conversation today:
Chinese pug are called so as they are thought to origin in China 400 BC. There are different types of Sadhus who assemble at Kumbhmela: Nagas, Urdhwavahurs, Parivajakas, Shirshasinse, Kalpvasis. The mounds constructed by termites can give clues for efficient building architecture (link). Hawa Mahal in Jaipur is painted with calcium oxide. Thomas Edison did not invent the bulb; the bulb existed already.