Actually I'd say there are less planets than we originally expected. Something like 90% of all exo-planets that we've discovered are all gas giants. Also, at some point, something becomes so improbable that it will never happen in the life span of a 26 billion-year universe. Winning a lottery three or four times is nothing in terms of improbability. A physicist can determine that mathematically it is POSSIBLE for you to take a red-hot poker and immerse it in water and the temperature of the iron will increase. Because heat is transferred by random collisions of particles and in some incredibly rare cases an oblique collision of molecules can cause heat energy to transfer from the cooler to the hotter material. The odds are roughly 1 in 10(80) --- pretend that's superscript. That doesn't sound like a huge number in terms of scientific notation, but it's considered improbable enough that it will not happen in the history of our universe. In fact 1 in 10 (50) is something along the lines of "if every particle in existence makes one attempt every second from the beginning of history until the end of history the odds are roughly 50-50 it will happen once."