It takes 687 days for Mars to orbit the Sun, which is 1.88 Earth years. 1.88 x 1.88 = 3.5378 which has a cube root of 1.5237 meaning that on average Mars is 1.5237 times the Earth's average distance from the Sun.
boulder definition: The definition of a boulder is a large, smooth rock. (noun) When you build a retaining wall and use a large rock in the wall, this rock is an example of a boulder. A rock that has been detached from the earth by erosion or for ot...
landmark. n. 1. a prominent or well-known object in or feature of a particular landscape. 2. an important or unique decision, event, fact, discovery, etc.3. a boundary marker or signpost.. something used to mark the boundary of land. 3. a building or other place of outstanding historical, aesthetic, or cultural importance. 4. a significant or historic event, juncture, achievement, etc. 5. to declare (a building, site, etc.) a landmark.