Climate Warnings, Growing Louder

The news that atmospheric concentrations of carbon dioxide, the most important global warming gas, have hit 400 parts per million for the first time in millions of years increases the pressure on President Obama to deliver on his pledges to limit this country’s greenhouse gas emissions.
Read the editorial of nyt :
http://www.nytimes.com/2013/05/19/opinion/sunday/climate-warnings-growing-louder.html?hp&_r=0 

Scientists Report First Success in Cloning Human Stem Cells

It’s been 17 years since Dolly the sheep was cloned from a mammary cell. And now scientists applied the same technique to make the first embryonic-stem-cell lines from human skin cells.

Read more: http://healthland.time.com/2013/05/15/first-success-in-using-human-egg-to-reprogram-cells-back-to-embryonic-state/#ixzz2Tk3tX3DZ