Who was the creator of the first successful photograph?

Joseph Nicéphore Niépce

Which music video features Taylor Swift dancing through various iconic styles, including ballet and hip-hop? What term is used in cricket for dismissing the batsman by hitting the stumps directly? Who was the female vocalist of Fleetwood Mac? Who first proposed that disease could be caused by microscopic organisms (germ theory) in the 19th century? Which element has the chemical symbol Fe?