I've watched documentaries about the solar system, where it is suggested that Venus once had oceans of liquid water similar to those that cover most of Earth today. Venus is now in a period of run-away green house effect and has lost its oceans.
I've always wondered whether the apparent over abundance of water on Earth could be partially explained by our planet sweeping up the water, pushed into Earth's path by the solar wind, after it had been liberated from Venus. I know the consensus on where our water came from is a bombardment of comets - but I've always wondered whether some could also have arrived after Venus heated up.
How stupid is this as an idea?
some news just in from the bbc