Exploration of Mars seasonal vegetation and apparent linear features were ascribed to intelligent design. Further telescopic observations found two moons, Phobos and Deimos, polar ice caps and the feature now known as Olympus Mons, the solar system's tallest mountain. The discoveries piqued further interest in the study and exploration of the red planet. Mars is a rocky planet, like Earth, that formed around the same time, yet with only half the diameter of Earth, and a far thinner atmosphere; it has a cold and desert-like surface. The minimum-energy launch windows for a Martian expedition occur at intervals of approximately two years and two
Mount Olympus Mount Olympus Mount Olympus (; "Olympos", for Modern Greek also transliterated "Olimbos", or ) is the highest mountain in Greece. It is located in the Olympus Range on the border between Thessaly and Macedonia, between the regional units of Pieria and Larissa, about southwest from Thessaloniki. Mount Olympus has 52 peaks, deep gorges, and exceptional biodiversity. The highest peak, Mytikas (Μύτικας "Mýtikas"), meaning "nose", rises to . It is one of the highest peaks in Europe in terms of topographic prominence. Olympus is notable in Greek mythology as the home of the Greek gods, on Mytikas peak. Mount Olympus is