Mars and seasonal cycles of Mars are likewise similar to those of Earth, as is the tilt that produces the seasons. Mars is the site of Olympus Mons, the largest volcano and second-highest known mountain in the Solar System, and of Valles Marineris, one of the largest canyons in the Solar System. The smooth Borealis basin in the northern hemisphere covers 40% of the planet and may be a giant impact feature. Mars has two moons, Phobos and Deimos, which are small and irregularly shaped. These may be captured asteroids, similar to 5261 Eureka, a Mars trojan. There are ongoing investigations
Two Is Better Than One and join. A music video ecard was also released for the song. The single was sent to mainstream radio in the United States on October 19, 2009. FMQB Mainstream Releases "Two Is Better Than One" debuted at number 92 on the "Billboard" Hot 100. It fell off the following week but re-entered at number 79 and rose the following week to number 64. After a few weeks, the song then reached its peak at number 18 on the chart. It has since become Boys Like Girls' third top 40 on the Hot 100 as well as Swift's twenty-first entry in