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.
These include: 1  The Martian day (or sol) is very close in duration to Earth's. 2  Mars has a surface area that is 28.4% of Earth's, only slightly less than the amount of dry land on Earth (which is 29.2% of Earth's surface). 3  Mars has an axial tilt of 25.19Â°, similar to Earth's 23.44Â°.