Sgt. Courtney White carries her machine gun before a live fire exercise at the Marine base at Twentynine Palms, Calif. David Gilkey/NPR hide caption

Henry J. Heinz Library of Congress hide caption

Water molecules between two layers of graphene arranged themselves in a lattice of squares — unlike any other known form of ice. NPG Press via YouTube hide caption

The Josephson family in 2001, after Dixie (third from left) was told she had cancer. Courtesy of the Josephsons hide caption

A simulation from the Neitz lab of what colorblindness looks like, with normal color vision on the left and red-green colorblindness on the right. Courtesy of Neitz Laboratory hide caption

A photo of the Abdelaziz sisters before their reality show aired. Nadine Abdelaziz/Via Instagram hide caption

Cuban artist Tania Bruguera poses for a photograph near the statue of José Martí in Havana's Revolution Plaza. She was arrested in December for planning a political performance there. Eyder Peralta/NPR hide caption

The male Asian subterranean termite (brown abdomen) and the female Formosan subterranean termite (orange abdomen) are surrounded by their hybrid offspring (eggs, larvae, workers, soldiers) in an eight-month-old colony. Thomas Chouvenc/University of Florida hide caption

The new album Lost And Found compiles unheard recordings from the Buena Vista Social Club sessions, as well as solo work from the musicians involved. Alejandro Perez/Courtesy of the artist hide caption