Apache htaccess authentication

Add this to your .htaccess file (note that you need to have the full path to the .htpasswd file)

AuthUserFile /full/path/to/.htpasswd
AuthType Basic
AuthName "Authentication required"
Require valid-user

you can generate .htpasswd(password) from this website: http://www.htaccesstools.com/htpasswd-generator/

4 dimensional world versus a multi-dimensional one

As far as I am aware most people think that we live in a 4-dimensional world – 3 dimensions of space and 1 dimension of time. That seems incorrect to me, in my opinion we live in a multi-dimensional world – every color, sound, smell, taste, feeling on your skin is a dimension.

Additionally, usually when you move through the world you consider yourself moving through one of the dimensions of space, however what if you are not actually moving but rather the picture in front of you is changing!?