To make your Friday that much better, here are the large versions of this week's channel photos.
(Have a photo you'd like to send in? Email it to firstname.lastname@example.org, or assign the tag "sbhomepage" to one of your photos on Flickr. Note: be sure to assign your photo an "attribution only" or "share and share alike" Creative Commons license so that we can use it.)
First photo here, the rest below the fold.
Life Science. A whale surfaces off the Brazilian coastline. From Flickr, by Amnemona
Physical Science. Upper Antelope Canyon in Navajo Tribal Park, Arizona. From Flickr, by Farol's Fotos
Environment. Morning smog over Shinjuku, Japan. From Flickr, by wili_hybrid
Humanities & Social Science. From Flickr, by dro!d
Education & Careers. From Flickr, by Mosieur J.
Politics. From Flickr, by Thorne Enterprises
Medicine & Health. From Flickr, by Steve Navarro
Brain & Behavior. From Flickr, by ul_Marga
Technology. From Flickr, by michael morel