Scientists have identified a green light ... by our planet's strong magnetic field, which pulls those particles down on to the poles. Artist's impression of the TGO at Mars: The spectrometer ...

Scientists are planning to build a human colony on Mars ... on the red planet might look like. His picture appears to be similar to what we have long thought aliens to look like - green and ...

Oxidized iron is responsible for the colour of rocks on Earth similar to those found on Mars. It is also what makes the blood red. The green tinge is also common in rocks on our planet.