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Scientists have known that dolphins recognize each other by the sound of each animal's signature whistle. But new research shows that dolphins remember and respond to these whistles for an incredibly long time — even after they've been separated from each other.

The Cascades frog used to occupy alpine zones from California to the Canadian border, but its range is shrinking as global temperatures increase and snowpack declines. Scientists are hiking deep into the mountains of the Northwest to study the tiny frog, which makes a call that has been described as a "chuckling" sound.

This summer, the New York Botanical Garden is featuring an exhibit called Wild Medicine: Healing Plants around the World. The most beautiful and interesting part is a small scale recreation of the 16th century Italian Renaissance Garden at Padua, the site of one of the earliest and most important medical schools. (This piece originally aired on Weekend Edition on July 6, 2013.)

Patty Stonesifer once held a top spot at Microsoft. After that, she spent years at the helm of philanthropy giant the Gates Foundation. But this year, Stonesifer downsized. She's taken on a smaller-scale role as CEO of Martha's Table, a Washington, D.C., nonprofit that serves the poor.

For years, cities and states have struggled to figure out what to do about the rise in ridesharing companies such as Uber and Lyft. California recently took the first steps toward legitimizing them, a move that could serve as a model for places also trying to catch up with the boom.

After being grounded for months, Boeing's 787 jetliner is back in the air. To help ensure that the planes keep flying and arrive on time, the company is monitoring the entire fleet in real time.

On Wednesday, lawyers helping accused Fort Hood shooter Maj. Nidal Hasan asked to have their roles reduced. They told the judge they think Hasan is purposely trying to lose this trial.

For all the fiscal cliffhangers and debt-ceiling brinksmanship over the past couple of years, Congress has been able to find some kind of solution at the last minute. This time, many budget analysts worry, might be different.

The winners will share a $448.4 million jackpot — the third-largest in Powerball history. Now might be a good time to check in on any relatives you have in Minnesota and New Jersey.

In Mozart's opera The Magic Flute, Tamino and Pamina can't get married unless brave Tamino passes three tests. At a performance in Austria this week, the trials by silence and fire were no sweat — water turned out to be a bit trickier. A gondola carrying three characters capsized.