7. There Used to be Water on Mars
While Mars has a dry surface now, scientists believe that there was once water on it. That would have been billions of years ago. Data collected by rovers and orbiters shows erosion designs and minerals that indicate there likely were once minor oceans and lengthy rivers across the majority of its surface. The scientific theory is that water is now frozen underneath the planetary surface; scientists hope to one day delve into those deeper levels of water to explore and gain more information about Mars.
6. Earth and Mars Share Many Characteristics
Yes, both Earth and Mars have similarities, including the same amount of land surface area. As well, both planets have a tilt in their rotational axes that are about the same; this tilt creates a bulge at the equator for both planets. Another similarity is that several scientists believe they both have had major changes to its climate occur over time. Persistent polar caps are also present on both Mars and Earth.
5. Gravity is Weak on Mars
The surface gravity on Mars is only 3.711m/s², which is significantly lower than the Earth’s gravity of 9.807m/s². That means that Mars has less than half the gravity of Earth! For a person who is 100kg in weight on Earth, their weight translates into just 38kg on Mars. The gravity on Mars does not do well with holding onto the atmosphere.