Yep, you've seen these photos before on our channel pages- but have you seen them THIS BIG?
(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. From Flickr, by JennyHuang
Physical Science. Arenal volcano in Costa Rica. From Flickr, by guano
Environment. An icy tunnel through New Zealand's Fox Glacier. From Flickr, by dave_apple
Humanities & Social Science. From Flickr, by Meanest Indian
Education & Careers. From Flickr, by riot jane
Politics. A sailor's image reflected in the Vietnam Veterans' Memorial. Via Flickr, from Deparment of Defense courtesy of pingnews
Medicine & Health. From Flickr, by Jef Poskanzer
Brain & Behavior. What do you see? From Wikimedia Commons
Technology. From Flickr, by quemas