re: #4 wrenchwench

a few recommendables:

FromTheLatin - An etymology microblog — every day the roots of a word are revealed, roots common among English words. A spelling lesson and a history lesson rolled into one.

GeorgeTakei - because, George Takei.

Wil Wheaton

Andy Carvin - astounding coverage of the “Arab Spring” uprisings.

NickKristof - New York Times columnist, two-time Pulitzer Prize winner

Michael McKean

Phil Plait - the Bad Astronomer.

Adam Savage of Mythbusters

Neil deGrasse Tyson - astrophysicist, heir to Carl Sagan’s throne