WHY DOES NASA OWN PARTS OF THE GRAND CANYON?

Reasons for NASA's Interest in the Grand Canyon:
Geological Comparisons: The Grand Canyon's layers of rock offer a rich geological history that can be compared to Martian features like the Valles Marineris, aiding in the study of planetary geology and the processes that shape these formations​​.

Remote Sensing and Earth Observation: NASA uses the Grand Canyon to test and calibrate satellite instruments. Data from these instruments are used to monitor environmental changes and natural disasters globally​​.

Educational and Public Outreach: The Grand Canyon is frequently featured in NASA's educational programs to engage the public and students in earth and planetary sciences. It serves as an accessible example of geological processes that also occur on other planets​