Welcome to Learning English, a daily 30-minute program from the Voice of America.

I'm Katie Weaver.

And I'm Mario Ritter Jr.

This program is designed for English learners, So we speak a little slower,

and we use words and phrases,

especially written for people learning English.

On today's program,

Hanna Mateo tells about chorus waves, where they come from, and why space scientists

are interested in them. Then, John Russell reports on a gift of thousands of kilograms

of live fish received by a food bank in New York.

On the Health Report, Andrew Smith talks about a new treatment for high blood pressure.

Finally, learn the ins and outs of food trucks on Lesson of the Day.

But first, here is Ana Mateo.

International researchers recently released a study on bursts of energy in an unexpected area of space.

Scientists call the energetic activity chorus waves,

because they are said to move at the same frequency as sounds humans can hear.

When the energy is turned into audio signals, the waves sound like birds chirping.

Researchers have known about chorus waves in space for many years.

But the latest research has found the waves exist 100,000 kilometers from Earth.

Chorus waves have never before been measured at such a big distance from a planet.

In an email, study writer Chengming Liu from Beihung University in Beijing wrote,

They are one of the strongest and most significant waves in space.

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