No one person invented the stills camera, these three answers give the names and first recorded events of the significant factors involved in their development. 1) In ancient times possibly back to the 4th century BC it was known that a darkened room... (read more)

If you square a number and reduce the square to it's prime factors those prime factors will have even exponents only if it's a rational number, therefore if you multiply a number reduce the square to it's prime factors and those prime factors have odd... (read more)

Simultaneous equations are fun. No, really, they are, especially the simple ones. e.g. 5x + y = 17 6x + 2y = 22 They are called simultaneous, I suppose because you get 2 equations to muck about with, or maybe because there are two variables, who knows?... (read more)

Birth control is an issue of concern for both males and females however males get less of an option. Men have five methods of birth control: AbstinenceCondomsOutercourseVasectomyWithdrawalThis brings... (read more)

The door handle was most likely 'invented' not that long after the 'invention' of the door, which would be long before any advanced civilization existed. At first these doors wouldn't have required a door 'knob' as such, since they wouldn't have a latch,... (read more)

Zsa Zsa Gabor, the hungarian born american stage, film and television actress has had 9 marriages, 7 divorces and 1 marriage annulled*. Here are her husbands in chronological order: Burhan Asaf Belge (1937 - 1941) (divorced) Conrad Hilton (April 10,... (read more)

Nice answer Toni, thanks. By the way, I have been doing some research and found out that although Catalan is spoken in France, particularly in the Roussillon and the Pyrénées-Orientales, it is not recognized officially because the French Constitution... (read more)