Science & Mathematics
Blogs and on-line magazines:
Some specific sites of interest:
Singing Pi Will continue singing for infinity. This site works with IE but does not seem to work with Opera. Snowflakes in 3-D Cross your eyes, relax your vision until there are three images, then focus on the center image.
Museum of Unnatural History
National Geographic Picture of the Day
Earth Science Picture of the Day
Astronomy Picture of the Day