The age of a lobster, or a crab or shrimp, can be determined by counting growth rings, as is done with trees. But scientists aren't sure yet how old a lobster can live to be.
Per capita ownership of firearms in the US has doubled since 1968.
Doing Good
What happens when ordinary people decide to pay it forward? Extraordinary change...
Estela de Carlotto has spent nearly 34 years searching for her own missing grandson.
Estela de Carlotto hunts for Argentina's grandchildren 'stolen' decades ago
Estela de Carlotto heads the Grandmothers of Plaza de Mayo, who seek to reunite children taken from their mothers during Argentina's military dictatorship with their real families.
Become part of the Monitor community