As always, take a gander at the full-size versions of this week's channel photos.
(Have a photo you'd like to send in? Email it to photos@scienceblogs.com, 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.
From Flickr, by Brian Switek
Astronaut Leroy Chiao, and his refracted image in a sphere of water, aboard the International Space Station, from NASA
San Diego fires, from Flickr, by TailspinT
From Flickr, by ninjapoodles
From Flickr, by jurvetson
From Flickr, by takomabibelot
Transmission electron micrograph of influenza virus particles, from Flickr, by pingnews.com
From Flickr, by Gaetan Lee
From Flickr, by rodrigo senna