According to Science Now scientists in France have taken on an interesting, but possibly dangerous, new line of research. They've resurrected a retrovirus that infected our ancestors millions of years ago. I have some qualms about bringing back anything that's been capable of infecting humans in the past, for obvious reasons, I think. Especially when the article states:

The researchers showed that the newly crated virus could infect a variety of human cell lines and replicate.

Even if we've adapted over the years to have some resistance to such a virus, I think it's always scary when these things from the past are brought back. There's really very little known about such viruses, thus the scientific interest in bringing them back, but also the risk. At least they call this one "a wimpy one", but what's to say the next one isn't a little different than what they think they're getting? Being a scientist I'm all for the advancement of science, but from what the article says, it seems like there was very little oversight on this project, and the risks may not have been fully contemplated before the work was done. I hope this serves to make people think about what could happen, so that science of this variety is carefully monitored in the future.