Via Corey Salyards
Forecast.io has a really simple interface. You can even put in the latitude and longitude in the URL to get a view of the weather anywhere on Earth. Fast forward to the future and rewind to the past. It works great.
What is necessary to establish the existence of something that has no mass, occupies no space, makes no sound, has no odor, and reflects no light?
This chart was taken from http://britton.disted.camosun.bc.ca/jbrubbergeom.htm
See also: http://en.wikipedia.org/wiki/Topology
Learn Python from the folks at Google. Their training material assumes you have at least a little programming knowledge.
If you are an absolute beginner I suggest you start with Think Python: How to Think Like a Computer Scientist.