How long would you survive on Mars ?

Mars is a well know place for almost all of us, it will be most probably the first planet in our solar system humans will colonize in not too far future. But, have you ever wondered how long will you survive on the surface of MARS? ... Without a Space suit?

The good news is you will last longer than you would on the surface of Venus, which has the hottest surface temperature among all the planets and has an incredibly high atmospheric pressure of 90atm.
But the bad news is you will still pass out in less than 30 seconds and be dead in less than a minute, may be 90 seconds if you are lucky.
Earth and Mars do have things in common like they are both rocky planets i.e they have a surface to stand on, but since Mars is only about half the size of Earth, it has 38% of earth's gravity. So you might have trouble standing properly, but that will be the least of your problems out there.
First thing, Mars is very cold because of its thin atmosphere and very long distance from our sun (228 million Km) and since the atmosphere cannot retain much of the heat, the avg temperature hovers around -60℃, the extremes are -125℃ at the poles and a comfortable 20℃ at the equator on a summer day. 20℃ is perfectly livable but then there is another problem, radiation. Since it does not have a magnetic field like that of the earth, and the atmosphere is also very thin, the radiation from the Sun almost directly hits the surface with pretty much full strength. These two problems won't instantly kill you, problems will come later when you start having mutations in your cells because of the radiation.
The biggest problem is the atmosphere itself. Mars is not technically a vacuum but it's about as close as you can get without actually being in outer space. The atmosphere is almost entirely of CO2(95.32%), Nitrogen(2.7%), Argon(1.6%) and a trace amount of our favorite Oxygen(0.13%).
That's enough of an atmosphere to support some winds and some clouds, but the surface pressure of Mars is about 1/100th of that of the earth. And the human body does not do very well when exposed to extremely low atmospheric pressures. No, your eyes won't pop out from your sockets. But because of this extremely low pressure, many of your bodily fluids will start to vaporize. Means your sweat, saliva, and tears would evaporate within a few seconds, which won't be too comfortable. Also, all that water in your body will start to vaporize, but because of your elastic skin, you won't explode but will become bloated. That will give you extreme decompression sickness. And since there will be little to no liquid water in your body, you will go unconscious within 30seconds and be dead by the end of the minute.
For all the future space explorers it's my advice to always wear your space suit while walking outside on Mars.

Thank you for reading my first blog.
Tridip Saikia