1 One of the adverse effects of smoking analogue cigarettes is the damage to the cilia. 2  Cilia are the small hair-like organelles which assist in reducing your risk of infections by pushing mucus out of your lungs. 3  The regenerative process your lungs undergo include the repair of the cilia.
Mars is approximately half the diameter of Earth, and its surface area is only slightly less than the total area of Earth's dry land. Mars is less dense than Earth, having about 15% of Earth's volume and 11% of Earth's mass, resulting in about 38% of Earth's surface gravity.
Ever since astronomers in the 1800s noticed markings on Mars that looked like canals, people have imagined that there could be life on the planet (Martians!). 1  Of all the planets, Mars' climate is most like Earth. 2  Our other neighbor, Venus, is hotter than humans could ever endure.3  Still, Mars is not exactly like Earth. Of all the planets, Mars' climate is most like Earth. 2  Our other neighbor, Venus, is hotter than humans could ever endure. 3  Still, Mars is not exactly like Earth. 4  The air on Mars is as thin as the atmosphere 55,000 feet above Earth, and it's almost entirely carbon dioxide. ( 5 That's what we exhale.