Apparently they scanned a lot of data to find these new exoplanets:

Crossfield said that Kepler observed more than 60,000 stars and found 7,000 transitlike signals during the first five 80-day observation campaigns. A validation process whittled some of these signals down to planet candidates, and then finally to validated planets, each of which has just a 1 percent chance of being a false positive, Crossfield added.

Do you think kepler-452b for example is a worthy target to give more attention in terms of the search for advanced civilizations?

Or perhaps they should use another technique in scanning particular exoplanets of interest?

And check out this cool documentary below on these space phenomena!

thanks to space.com for the great info