Moons of Mars formed a large moon. Gravitational interactions between this moon and the outer ring formed Phobos and Deimos. Later, the large moon crashed into Mars, but the two small moons remained in orbit. This theory agrees with the fine-grained surface of the moons and their high porosity. The outer disk would create fine-grained material. While many Martian probes provided images and other data about Phobos and Deimos, only few were dedicated to these satellites and intended to perform a flyby or landing on the surface. Two probes under the Soviet Phobos program were successfully launched in 1988, but neither conducted the
Two Is Better Than One Two Is Better Than One "Two Is Better Than One" is a song by the American rock band Boys Like Girls from their second studio album "Love Drunk" (2009). The song features American singer Taylor Swift. It was written by Martin Johnson and Swift and the song is the band's second official single from the album. On some advanced copies of the album sent to reviewers and members of the press, the song does not feature Swift, rather, Johnson handles all vocals. The track was a commercial success. By December 2011, "Two Is Better Than One" had sold 1,508,000 copies