Hamster breeding and genes: http://home.comcast.net/~cricetus/genetics.htm

All things Apple/Macintosh: http://www.macintouch.com/

Photography (digital and film), microphotography, and portrait photography: http://digital-photography-school.com/portrait-photography-tips

Astronomy and astrobiology: http://astrobiology.nasa.gov/

Etymology and word meanings: http://www.etymonline.com/