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Given the intricacies of individual insurance plans, co-pays and hospitals' calculations to determine how much to charge for care, it is no simple feat ...

Humorist John Hodgman tells a story about aliens, physics, time, space and the way they all contribute to a sweet, perfect memory of falling in love.

Will we find ET in the next 25 years? Seth Shostak, senior astronomer at SETI, says yes. He explains that new technologies and the laws of probability make the breakthrough likely.

Chef Dan Barber tackles a dilemma facing many chefs today: how to keep fish on the menu. He chronicles his search for a fish that would please both diners and environmentalists.

Dr. Anthony Fauci, director of the National Institute of Allergy and Infectious Diseases, talks with Mary Louise Kelly about how the Zika virus may spread.

"We love you, Dave Mirra. We're going to miss you," says the mayor of Greenville, N.C., the town where the legendary X Games athlete lived for years.

Medical researchers often use race to define health risks. But a geneticist and a sociologist say racial categories don't accurately reflect who people are, and that science has to change.

The virus was first identified in 1947 in a rhesus monkey in the Zika Forest. Our maps show how it spread slowly at first, then last year began a rapid invasion of the Americas.

"When everyone's attacking you, you must be doing something right," Rubio told reporters in Manchester this week.

Discovery of Zika virus in the saliva and urine of infected people is concerning but may not mean the pathogen can actually be transmitted through those fluids, experts caution.