Sorry if this is old to some … But I stumbled upon Robert Krulwich’s NPR science blog yesterday, and found myself sucked in for hours. So kiss your time goodbye, and enjoy. 
So wich krul wonder should we read first?
Definitely the one about the death of the Cosmonaut.
Goosebumps. Especially interesting to me was a letter
written by William Safire to be read by Pres. Nixon in
the event Apollo 11 couldn’t get back from the Moon,
stranding Armstrong and Aldrin. Those guys really plan
ahead!
That post also directed me to another interesting blog:
http://www.lettersofnote.com/
The cheating elephant is also pretty cool.