Martians are physiologically closest to Earthlings. It is unknown why, since all the aliens have been placed on their respective planets at around similar times. One famous theory is because they had to change the least to adapt to their environments. Because of Earthlings and Martians being closer, Earthling-Martian offspring are common.
Martians have long fur covering the entirety of their bodies. The purpose of this fur is to not only keep them warm due to Martian weather constantly being below -4 degrees celsius, but also to protect them during sandstorms. Due to the atmosphere being thinner, Martians have larger lungs and hearts than the other aliens. Martians are also the tallest of the species too due to Martian gravity being weak. It is not uncommon to see a Martian be around 230 centimeters tall for both sexes because of this. While their lungs and hearts are larger, they have a rather short life span of only 55 years on average. They also age very quickly.
Earth Martians: If a Mars born Martian moves to Earth, they would prefer living in areas such as the Atacama desert since it is a cold desert. Humid or hot climates are hell for these creatures especially with the fur. Earth-born Martians are shorter compared to native-born Martians because of Earth’s gravitational pull. Since Earth is warmer than Mars, Martians overheat easily with their fur. Because of that, Martians shave their fur to keep cool. They like to shave their fur into patterns and other cool designs as a fashion statement. Martians live shorter on Earth than on Mars (average lifespan is 40 years), since they are more likely to have heart problems. Other than that, Martians do not have a hard time existing on Earth, and in fact, co-exist with Earthlings the best.