BBC NEWS | Health | Brain size 'not key to intellect'
BBC NEWS | Science/Nature
A New Way to Think About Earth's First Cells
A team of researchers at Harvard University have modeled in the laboratory a primitive cell, or protocell, that is capable of building, copying and containing DNA.
Scientists exploring why optimism is so prevalent
This campaign season, Barack Obama has branded himself as the candidate of hope. And many voters and pundits have swooned, enchanted by his message of positivity and his faith that better times are ahead for the nation and its citizens.