Carnival of Space week 53 is up at spacecynic
Nextbigfuture supplied its article about new lasers that are 100 times faster and able to improve the sensitivity of earthlike planet detection by one hundred times
Colony Worlds talks about whether Mercury is better than Mars for colonization
Centauri Dreams talks about life propogating through the interstellar space via microbes.
There are several other articles at the carnival of Space week 53 is up at spacecynic