DNA studies reveal that the First Americans came from Asia in 3 main groups. And then they mingled and merged. The oldest American human remains, from Oregon, are now dated at 14,500 years ago. They are not bones. Tools from this site are different from Clovis, and maybe older. SCOTUSblog presents a tick-tock explaining how and why CNN and Fox News messed up the Supreme Court's Obamacare decision so badly. Is "Obamacare" a dirty word?
As readers of this column likely experience on a regular basis, the way other people perceive our work can be quite context dependent. We are particularly sensitive to contextual variables like scientific literacy level and socioeconomic background in our audience. From the Spring 2012 ScienceWriters.