Astronaut Maya landed her small spacecraft in the middle of a vast desert. The desert looked like a golden savanna, but there were no animals in sight. She was on a mission to find out why the plants were disappearing. The sun was hot, and the wind was dry, but Maya stayed calm. She knew that patience would help her solve the mystery.
Maya walked slowly across the sand, looking for clues. She saw small holes in the ground, which were made by tiny insects. Nearby, she found a dry riverbed that had no water. She realized that a long drought had changed the land. Without rain, the grass could not grow, so the animals had to move to find food. This was the start of a great migration.