A new form of DNA

This is way cool. Even though it isn’t aliens.

If you want serious coverage, go to Ed Yong and Carl Zimmer, who explains the skeptical point of view.

Additional: More criticism of the paper.

Reference

Wolfe-Simon F, Switzer Blum J, Kulp TR, Gordon GW, Hoeft SE, Pett-Ridge J, Stolz JF, Webb SM, Weber PK, Davies PCW, Anbar AD, & Oremland RS. 2010. A bacterium that can grow by using arsenic instead of phosphorus. Science. DOI: 10.1126/science.1197258