What was the first country to allow females to vote?
New Zealand was the first country to allow women to vote (in 1893), while the King Abdullah of Saudi Arabia granted women the right to vote in 2011. The United States finally began allowing women to vote in 1920, after the ratification of the 19th Amendment to the Constitution.
http://www.infoplease.com/ipa/A0931343.html
When was soap invented?
Early history[edit] The earliest recorded evidence of the production of soap-like materials dates back to around 2800 BC in ancient Babylon. A formula for soap consisting of water, alkali, and cassia oil was written on a Babylonian clay tablet around 2200 BC.
http://en.m.wikipedia.org/wiki/Soap
Which planet has the most oxygen?
Interestingly, there is also a lot of oxygen on Venus and Mars, which is perhaps not surprising, since they are the closest planets to Earth and probably formed in similar conditions. In their cases, however, most of the oxygen is there in the form of carbon dioxide.
http://yttriumj12.imascientist.org.uk/2012/07/04/why-is-there-no-oxygen-in-space-how-does-earth-have-oxygen-but-not-any-other-planets/