One made up of 78% nitrogen, 21% oxygen, and less than 1% inert gases (such as argon, neon, etc.)
Humans exist as a result of evolution, where over time, our ancestors adapted to their environment and evolved into the species we are today. Additionally, humans exist due to a combination of biological, social, and cultural factors that have shaped our development as a species. Ultimately, the existence of humans can be attributed to a complex interplay of genetic, environmental, and evolutionary processes.
Gravity ! The gravitational pull of the Earth 'traps' the atmosphere close to the ground.
Yes. Mostly Hydrogen & Helium.
No. Mercury essentially has no atmosphere. Earth is the only planet with an atmosphere that humans can breathe.
Any special effect exist.
Yes. Earth's atmosphere is about 21% oxygen. Without it, the vast majority of life we see, including humans, could not exist.
What caused the Earth's atmosphere to exist?
The atmosphere retains oxygen which humans need given off by plants and regulates the temperature at survivable levels during both day and night.
Water... and a climate that will allows it to exist simultaneously in 3 forms: Liquid, Gas, Solid
could water exist as a liquid if we don't have a atmosphere
Vampires do not co-exist with humans peacefully because vampires do not exist, period.
Humans did not evolve from monkeys, but rather, humans and monkeys evolved from one type of organism. They have a common ancestor, something that has traits of humans and monkeys, but they went separate ways.
the use of fossil fuels by humans had tainted the air and atmosphere
Ununoctium doesn't exist in atmosphere.
humans
None. Asteroids exist outside the atmosphere.
I believe God created man after He created the earth. I do not believe there was ever a era when humans did not exist. :)