Why can't there be human life on mars or venus?

Answer 1

For the same reason there was no human life in the Antaric. The temperature was too extreme. On Mars to Cold, on Venus too hot, and on both little or no oxygen to breath. Mars will soon show evidence of continued and present life, but Venus is many years away...

Answer 2

On Mars, the space probes have found frozen water at the poles. So, it would be possible to have a source of water, assuming that a human (or a team of them) could purify the water. The main problem with colonizing Mars is the long time it takes to get there and back. Even if humans were able to grow crops, reuse water, and somehow create water, if there was ever a disaster causing the crops, water, or the machinery that makes the water to be destroyed, who would send the supplies to the people there. It takes many pounds of fuel to lift one pound of machinery, and it takes like a week to get to Mars, not to mention finding enough fuel to get back. Even assuming that there was no disaster that would ruin the colony, how would a person live in a zero-gravity environment? Flames require 100+ decibel sound blasts to be put out, because a simple "blow" would not do. Water and other liquids would be hard to drink, for the water might not stay in a cup. In the time it takes to build a colony, who or what would support the builders in the first place. Remember, if you were to bring plants, you must bring soil.
When it comes to venus, it would be hard getting there and on the planet in the first place. A venus probe could barely stand the acidity

Answer 3

Human beings COULD live there, if they brought enough equipment and supplies to keep themselves alive and protected from the environment.

On Mars, there's very little air, and not enough to breathe. You would not be protected from solar radiation. Average temperatures are about -250 degrees F and there's nothing to eat or drink there. Well, not without a lot of work.

On Venus, there's too MUCH air pressure and not enough free oxygen to breathe. The atmosphere is mostly carbon dioxide and some sulfur dioxide. The average temperature is around +700 degrees, so most of the stuff you bring will either burn or melt. You'll need a lot of insultation, but cooking dinner will be easy. Just remember to bring it with you.

Mars is the easier target for human colonization. You can build pressurized, heated shelters, hothouse gardens and waste recycling systems. But it will take a lot of time and material to make it self-sustaining. In the future, if enough water and oxygen can be found, it might be possible to "terraform" Mars to be more like Earth, but not for a long time.

Answer 4

Second, Mars' atmosphere is very thin. When humans figure out how to terraform, then living on Mars may be a possibility. Venus, however, has a very dense atmosphere; a surface pressure 100 times that of Earth's. One cannot forget about the clouds of sulphuric acid that rains down, or the high-speed winds that whip across this barren planet.

Answer 5

As for Venus, there are constant rains of sulfuric acid (we'll soon have that on earth too on account of pollution) which would dissolve you in seconds. Also there are tremendous pressures that would squash you, the incredible heat would fry you, and you would also have a hard time getting oxygen to breathe without suffocating in many noxious fumes. Needless to say there's not too much water either.
As for Mars, there is a very thin atmosphere which would let dangerous radiation in, there is not much oxygen, no water (the poles are made of frozen carbon dioxide), and, of course, it's freezing cold.

Answer 6

Humans just like us couldn't survive on either planet without major life support.
We would need oxygen, water, heat, air pressure, power, and radiation shielding on Mars.
We would need oxygen, air filters (to keep out the carbon dioxide and other gases in Venus' atmosphere), air conditioning (its 800 degrees F there), and some form of energy (no sunlight on the surface).

But that doesn't mean there isn't some life, we just haven't found any (yet).

Answer 7

human life, is a form of "complex life." Complex life could not have evolved on Mars as we know it.
Too many factors are required to allow the evolution and development of complex life, let alone "human life."

for complex life Mars would NEED
Critical Biogenic Elements:
Heaps of Carbon (C)
Loads of Hydrogen (H)* oceans of water must devlop
Batches of Nitrogen (N)
Plenty of Oxygen (O)*
Masses of Phosphorus (P)
Lots of Sulfur (S)

followed by:
thousands of lightening bolts, volcanic eruptions, and comets/meteorites rained upon the planet for several million years


The undeveloped environment of Mars, and its low gravity, would not allow for a developed atmosphere.
For these reasons, "human life" cannot have evolved on Mars. Life can however exist on Mars, just not in the "complex" form. Singled cell organisms can and probably do exist hidden under Martian ice caps.

However, humans can in fact live on Mars with the use of technology. Simply building a large reinforced acrylic bubble that would span hundreds of miles, would allow a human colony to be established on Mars.

Answer 8

Venus is too hot (it's surface temperature would melt lead due to a runaway greenhouse effect. The atmosphere there is lmost totally Carbon Dioxide.

Mars is too cold and has too thin an atmosphere.

Answer 9

the conditions aren't suitable. venus is to hot and has a crushing atmosheric pressure and mars is too cold and has a very thin atmosphere which is 95% CO2.

Answer 10

No air, no sustainable atmosphere......no life.