Scientists have not yet proven that Mars can currently support life as we know it on Earth. Based on data from the NASA Exploration Rover, Mars may have been able to support life approximately 4 billion years ago. More » Science Astronomy Planets

According to NASA, 7 billion years ago, Mars may have been an excellent place for microbes to live, but currently it cannot support life because the air is too thin and is comprised mainly of carbon dioxide. After drilli... More »

To survive on Mars, humans need the same things they need on Earth: water, a breathable atmosphere, and food. Mars is a hostile planet, and is currently unable to support human life. More »

As of 2015, the planet Uranus cannot support life as it is known on Earth. However, it is not impossible for this ice giant to sustain other life forms that can withstand its harsh environmental conditions, which are vas... More » Science Astronomy Planets

Mars earned its famous moniker, "red planet," due to its red appearance that is highly visible from Earth. The distinct rusty-red color of Mars is attributed to the abundance of iron-rich soil that covers the planet's su... More »

The best time to view Mars is during the Mars Close Approach, which is when the orbits of Mars and Earth bring the planets closest together. When Mars and Earth make this close approach, Mars can be seen from sunset to s... More » Science Astronomy Planets

As of 2014, it takes approximately 150 to 300 days for a spacecraft to travel from Earth to Mars. The time depends on the launch speed, how much fuel is used and the alignment of Earth and Mars. More »