The Surprising Ways Mars is Hostile to Life

Comparatively speaking the Earth is SIGNIFICANTLY more hostile to life than Mars is. Without even considering the "hostile" aspect towards any species other than humans, the Earth has many thousands of ways for one of us to get ourselves killed. Severe weather, extreme temperatures both hot and cold, various other environmental hazards, and most abundant of all; other life. All told humans are pathetically easy to kill, either directly (by claws, teeth, etc...) or indirectly, such as the transmission of viruses or diseases. Rabies, for instance, can infect basically ANY mammal species on the planet, and not only can they then pass it on to a human, the actual symptoms of the disease itself MAKE the infected much more likely to attack. Once symptoms appear, regardless of the species, rabies is 100% fatal. As in, if you aren't vaccinated and happen to get rabies, by the time you know you're already guaranteed to die.