Silver is known to kill bacteria, but the addition of an electric current makes the process even more effective, killing up to 98% of bacteria.

CNN: Nanotech and 'tea bag' to clean up drinking water

The market slumped, killing the e-commerce boom in the process.

FORBES: Microsoft Is Us

In the past, Apple has been able to handle this process of maturation by creating category-killing products in big existing markets.

FORBES: Apple Plunges $50 On Short Revenue -- What Does This Mean for Apple's Leadership?

That process is damaging the coral, and warmer waters are also killing parts of the reef.

NPR: Pacific Island Cultures Brace for Climate Change

Or that the beatification process has started for Latin Americans such as Father Rutilio Grande, whose killing inspired Romero's social justice work, and Bishop Enrique Angelelli, who died in a suspicious car crash in Argentina.

CNN: Pope Francis' powerful signal to the poor