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In Part 1 of the series Total Failure, a former NASA official recalls the disastrous mission of the space shuttle Columbia in 2003 and how the accident changed his life forever.

Searching for alien life is harder than you might think, because whatever is out there might be really odd. So leading astrobiologists are meeting to advise NASA on how to go about looking for it.

Bill Kurtis reads three news-related limericks...The Leafy Green Monster, Shoppercise, Self-driving Babies

Equally optimistic and concerned, the longtime television news anchor — now a Facebook phenomenon — has written a book that doesn't hide his love of country.

Two weeks before Hurricane Harvey struck, monsoon rains swamped Bangladesh, India and Nepal. Aid groups are struggling to deal with both disasters.

There aren't many pharmacies in Haiti. But there are vendors who walk the streets with towers of pills — including some that may be fake or past their expiration date.

The Puerto Rican government has prioritized getting power back to hospitals. Many clinics and doctors' offices, like other small businesses on the island, still don't have electricity.

Fresh herbs are some of the most perishable items in the produce section. And yet, shoppers must buy amounts that are bound to go wasted at home.

Police are trained to avoid warning shots for tactical and legal reasons. But this long-standing prohibition is being reconsidered under public pressure to reduce deadly shootings by police.

The grandson of an oil baron, Rockefeller made his own name as the chief of Chase Manhattan Bank. But he was known nearly as well for his prodigious collections — of art, contacts and even beetles.