Apparently, this user prefers to keep an air of mystery about them.
21 Are the air particles in today's wind on earth (more or less) the same as the air 2/3 billion years ago? Sep 9 '13
7 Do we breathe air by creating a vacuum? Aug 2 '14
4 Why is earth on an axial tilt of 23.4 degrees? Mar 30 '14