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NASA is building a 2-pound helicopter drone that would help guide the vehicle on the Red Planet's surface. That way, the rover wouldn't need to wander as much to find its way around.

Scientists worldwide face a yearly challenge in deciding what goes into the annual flu vaccine to make it effective. The job requires keeping tabs on a massive group of speedy, shape-shifting viruses.

A goat at a Safari Park in Russia was dropped into the Siberian tiger enclosure as lunch. But instead, it butted the tiger out of its sleeping space. The two are friends now and take daily walks.

An active shooting situation is unfolding at a Planned Parenthood Clinic in Colorado Springs, Colo. Multiple police officers and civilians have been injured.

Li-Fi is a lot like Wi-Fi, but it uses light to transmit data. NPR's Scott Simon speaks to the man who invented the faster alternative: Harald Haas.

In the aftermath of the deadly terrorist attacks in Paris, NPR's Scott Simon speaks with Bruce Hoffman of Georgetown University about what information intelligence agencies need to keep the U.S. safe.

Singer Cécile McLorin Salvant says she likes the "husky lows" of jazz. Justin Chang reviews The Danish Girl. Peter Guralnick profiles the founder of the Sun Records label in his book, Sam Phillips.

The talk in the Barbershop this week is about Black Friday, Black Lives Matter and social "cuffing." Wesley Lowery, national reporter at The Washington Post, Katie Notopoulos, a senior editor at Buzzfeed, and Jozen Cummings, an editorial associate at Twitter, join the conversation.

Many Muslims feel pressure – sometimes a responsibility — to defend their faith when there's an attack carried out in the name of Islam. Young American Muslims share how they handle the scrutiny.

A new paper says it's better to focus on concrete manifestations of climate change in our lives today — and what can be gained by making changes now — says psychologist Tania Lombrozo.