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The South American polka dot tree frog initially appears unremarkable. But when researchers in Argentina shone an ultraviolet light on the frog, it glowed.

When a serial graffiti artist left her mark around national parks, hiking and nature lovers took to Reddit to find the vandal. The culprit was recently sentenced and banned from federal lands.

Tyndall Air Force Base in Florida's Panhandle was hit by Hurricane Michael in October. Then Offutt Air Force Base in Nebraska was inundated by flooding this month.

Evidence that arose after Meek's trial is "of such a strong nature and character that a different verdict will likely result at a retrial," a three-judge panel in Pennsylvania says.

The International Union for the Conservation of Nature says the giraffe population has declined by as much as 40 percent in the past 30 years and could face extinction if the trend is not reversed.

In the second of a two-part report marking the 40th anniversary of the Wilderness Act, we profile the Gates of the Arctic National Park, north of the Arctic Circle in the Brooks Range of Alaska.

The new government may face pressure to set even more ambitious goals for a country that is one of the world's largest exporters of coal and liquified natural gas.

Jenny Lewis has the clear voice and honest melodicism of a guitar-strumming angel. But she is so good to look at and so forthright about her sexuality that some of Rilo Kiley's serious-minded natural audience suspect she is a pop starlet on the make, like Rihanna or the pitiable Britney Spears.

The last member of an Indigenous tribe in Brazil has died, apparently of natural causes.

Anointed the next bright hope of jazz, last year's breakout pianist took only two days to record his first solo album of originals and covers. Does it live up to high expectations? NPR's Tom Moon reviews the album here.