who invented the world's first fountain pen
Fountain pen An early historical mention of what appears to be a reservoir pen dates back to the 10th century. According to Al-Qadi al-Nu'man (d. 974) in his Kitab al-Majalis wa 'l-musayarat, the Fatimid caliph Al-Mu'izz li-Din Allah demanded a pen that would not stain his hands or clothes, and was provided with a pen that held ink in a reservoir, allowing it to be held upside-down without leaking.[2]
Toilet paper Although paper had been known as a wrapping and padding material in China since the 2nd century BC,[2] the first documented use of toilet paper in human history dates back to the 6th century AD, in early medieval China.[1] In 589 AD the scholar-official Yan Zhitui (531â€“591) wrote about the use of toilet paper: