I promise I'll start posting more than links. Until then, here are some interesting ones.
Snow on Mars!
Why calories taste good.
Rainbow compression wave from a jet caught on film.
Why can't we divide by zero?
A syllabus from one of the late David Foster Wallace's Pomona College classes.
Lighting up the brain to illuminate its secrets.
Are disposals green? Related - this site shows water consumption and drought conditions all over the country, in case you were wondering.
Hubble has a problem.
Can animals feel pain?
Order this kit and you can have your DNA lineage mapped. And here, you can have a DNA portrait made.