The scientists determined the three-dimensional structure of the protein and found that there are positively charged calcium ...

The positive and negative ions attract each other and form the ionic compound sodium chloride. One calcium and two chlorine atoms are near each other. An electron from each atom feels the attraction ...

Their findings suggest that calcium ions can selectively influence how primitive polymers form, shedding light on a long-standing mystery: how life's molecules came to prefer a single "handedness ...