1. Biochemist Linden Gledhill’s macro photography is out of this world. Get a close-up look at the tiled scales of these elusive beauties.
14. See more of Linden Gledhill’s butterfly-wing images on his Flickr.
- BuzzFeed News has identified a second member of the ISIS execution cell led by "Jihadi John."
- The New Hampshire primary, the second voting contest of the U.S. presidential nominating season, is on Tuesday.