Health & Science

Spotify, Google Play, Amazon Prime, Rdio, Rhapsody, Pandora — the list of streaming music service goes on and on. On Tuesday, Apple joins that lineup with the launch of its streaming service, Apple Music. Apple will give consumers a three-month trial, and then it will charge $9.99 a month.

But most music lovers still aren't sure why they should pay. Colin Barrett, 31, has tried a few of the streaming services, but he doesn't use them anymore.

The U.S. Supreme Court ruled Monday that the Environmental Protection Agency made a mistake when it told electric power plants to reduce mercury emissions. The high court says the EPA should first have considered how much it would cost power plants to do that.

The decision comes too late for most power companies, but it could affect future EPA regulations.

Mercury in the air is a health risk. When you burn coal or oil, you create airborne mercury that can end up in fish we eat and cause serious health problems.

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Transcript

ROBERT SIEGEL, HOST:

Copyright 2015 NPR. To see more, visit http://www.npr.org/.

Transcript

ROBERT SIEGEL, HOST:

Copyright 2015 NPR. To see more, visit http://www.npr.org/.

Transcript

ROBERT SIEGEL, HOST:

The Supreme Court has placed a stay on a lower court's ruling that upheld new abortion standards in Texas, to give opponents of a controversial 2013 law time to take their case to the nation's highest court.

The stay is temporary: If the Supreme Court refuses to hear the case, the stay will be lifted and the law will take effect. If the justices agree to hear the case, the stay would remain in effect until a ruling is issued.

The next time you dab wasabi on your sushi or spread mustard on your hot dog, take a moment to thank a caterpillar. It may sound unlikely, but the critters play a critical role in creating the sharp, pungent flavors that give those condiments a savory kick.

It's T minus four days until exam day, and Travis Driscoll is practically living at his desk.

"Each day, I'm easily here for five hours," he says. "I haven't done much of anything else but studying for the last two months."

Driscoll is one of 13,000 medical school applicants across the U.S. taking the new Medical College Admissions Test, or MCAT. He's got stacks of science books on his desk to help him prepare and a rainbow of biochemistry charts pasted to the walls: glycolysis, citric acid cycle, electron transport chain, mitosis, meiosis and DNA replication.

In the longest leg of its planned around-the-world flight, the Solar Impulse took off from Nagoya, Japan, and is now headed to Hawaii. The plane is powered solely by the sun's energy that's stored in batteries; the current trip is expected to last 120 hours — five days and five nights.

Ah, the bread basket. You sit down for a nice meal out, and there it appears: piping hot, giving off a waft of yeasty divinity.

Who can resist?

There's a reason this age-old tradition prevails. Even in the era of paleo and gluten-free, there are still hordes of us who will gladly nosh on crusty, chewy, soul-warming bread.

But the downside may be more than just some extra calories. Turns out, eating all those carbs before a meal can amp up our appetites and spike our blood sugar.

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