"How do we know if there is water on Mars? We send probes to look around! Readers learn how scientists use space probes to study planets in our solar system . . . and beyond"--
Provided by publisher.
"How do we know if there is water on Mars? We send probes to look around! Readers learn how scientists use space probes to study planets in our solar system . . . and beyond"--
Provided by publisher.