Life on Mars

Is there life on Mars? Enlarge Image

An image of a mysterious shape on the surface of Mars, taken by Nasa spacecraft Spirit, has reignited the debate about life on the Red Planet.

A magnified version of the picture, posted on the internet, appears to some to show what resembles a human form among a crop of rocks.

While some bloggers have dismissed the image as a trick of light, others say it is evidence of an alien presence.

The image is a recent Nasa posting of the Spirit's landing in 2004.

Read more in ... BBC http://news.bbc.co.uk/2/hi/science/nature/7205004.stm