Why do I do what I do?

The Curiosity rover is currently trundling its way across the surface of Mars in a quest to understand if Mars was ever able to support life and perhaps even detect evidence of past life. We’ve come a long way from fearing an attack from a hostile Martian civilisation. The Earth is at no risk from Martian rockets, heat rays or tripods. Mars, like our other nearest Solar System neighbour Venus, is a barren world devoid of any life. Why is the Earth the way it is and not more like Mars or Venus?

Photo: JPL / NASA

Prior to joining the Institute for Complex Systems Simulation at the University of Southampton I thought about this question rather a lot. It was a central part of my previous job as a member of the Helmholtz Alliance funded Planetary Evolution & Life project that I worked on at the Max Planck Institute for Biogeochemistry in Jena.

But my interest in this question predates my time in Germany. Continue reading