Modern day Mars is not dissimilar to the most extreme deserts on Earth. It is a barren and desolate place, yet is still the subject of intense study and curiosity. Why is there such interest in this planet, and why do so many space scientists believe it may once have harbored life? Essentially, the presence of life on any planet or satellite is determined by five key factors: 1. Temperature. For life to exist, the temperature of a planet must allow water to … [Read more...]