Featured in biology

Red crab on water.
Expedition 46 Flight Engineer Tim Kopra on a Dec. 21, 2015 spacewalk.
a painting hanging on a wall
Audrey Dussutour walking through her lab at the Université Paul Sabatier in Toulouse in France
a gray wolf
Synthesized false color image of Venus, using 283-nm and 365-nm band images taken by the Venus Ultraviolet Imager (UVI).
This image of the Moon was created with images taken by NASA's Lunar Reconnaissance Orbiter.
Artist's conception of NASA's OSIRIS-REx spacecraft collecting a sample from the asteroid Bennu.
Lava flows extend for hundreds of kilometers across the fractured plains shown in the foreground, to the base of Maat Mons on Venus.