1. Some behind-the-scenes photos of National Geographic photographer Joel Sartore at work at the National Aquarium in Baltimore.

    What’s the story?

    In order of appearance: big-headed amazon river turtle, Sartore with turtle, poison dart frog, rainforest curator Ken Howell holding a frog, puffins, Sartore with prehensile-tailed iguana. (@clairevoyant/NPR/via Instagram)

    - Claire