A cutaway illustration of the modern Martian interior. A meteor striking one side of the planet’s surface, left, creates seismic waves that are detected by NASA’s InSight lander, right.
Bison grazing near the Roosevelt Arch of Yellowstone National Park in Gardiner, Mont. Yellowstone is home to the last migratory herd — migratory bison are otherwise functionally extinct in their former range.
Connexion
