From the passage provided, extract the names of moons/natural satellites of Mars.

Context: Mars is smaller than Earth and Venus. It has an atmosphere of mostly carbon dioxide with a surface pressure of 6.1 millibars; roughly 0.6% of that of Earth but sufficient to support weather phenomena. Its surface, peppered with volcanoes, such as Olympus Mons, and rift valleys, such as Valles Marineris, shows geological activity that may have persisted until as recently as 2 million years ago. Its red colour comes from iron oxide in its soil. Mars has two tiny natural satellites thought to be either captured asteroids, or ejected debris from a massive impact early in Mars's history.

Answer: Mars has two moons/natural satellites : Deimos and Phobos