[Sabertooth]

Bold font added by your humble poster. Everybody be nice. Remember, we are all citizens of the "biodisc."

Try it this way:

"If planets capable of sustaining life are sufficiently common in the Galaxy, the Cardiff based scientists conclude that this mechanism could have infected over 10,000 million of them during the lifetime of our Galaxy."

Now, try this:

"At the rate we're finding If planets capable of sustaining life are sufficiently common in the Galaxy, the Cardiff based scientists conclude ...."

"10,000 million" of them is as scientific a statement as the fold-ins on the back cover of a Mad Magazine.

[AndrewC]

Mars is a bit closer than most stars, I believe. It should be literally coated with bacterial slime from Earth if this hooter of a theory is true.

[VinayFromBangalore]

In Britain,a billion is a million million.In America,a billion is a thousand million.Now get the picture?