Joe Palca

Astronomers in California are building the largest digital camera in the world. It will go on a giant telescope taking shape in Chile called the Large Synoptic Survey Telescope.

LSST is different from most large telescopes. Instead of staring at a tiny patch of the sky and taking essentially one snapshot in time, LSST will take a panorama of every part of the sky...and it will do so over and over and over. The idea is to see what's moving or changing in the heavens.

Editor's note: The Environmental Protection Agency has approved the use of mosquitoes infected with Wolbachia bacteria as a "biopesticide" in 20 states and the District of Columbia. The bacteria keep mosquitoes from spreading diseases like dengue and Zika. Back in 2012, NPR's Joe Palca wrote about scientist Scott O'Neill's 20 years of struggle to make the idea of Wolbachia-infected mosquitoes work. Here is his story.

Scientists in California think they may have found a way to transplant insulin-producing cells into diabetic patients who lack those cells — and protect the little insulin-producers from immune rejection. Their system, one of several promising approaches under development, hasn't yet been tested in people. But if it works, it could make living with diabetes much less of a burden.

For now, patients with Type-1 diabetes have to regularly test their blood sugar levels, and inject themselves with insulin when it's needed.

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Cassini Plunges To Saturn

Sep 15, 2017

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After 13 years in orbit around Saturn, NASA's Cassini spacecraft is about to plunge itself into the planet's atmosphere and disintegrate. NASA decided to put an end to the mission on Friday because the probe is almost out of fuel.

Cassini has provided exquisite details about the second-largest planet in our solar system.

Sometimes the true value of an invention isn't obvious until people start using it.

Consider what happened to inventor Nate Ball and his powered ascender. About 15 years ago, Ball was an undergraduate at the Massachusetts Institute of Technology when the U.S. Army approached MIT with a request: Can somebody build a powered device that can pull somebody up a rope, like Batman does?

There is a lifesaving drug that owes its existence to moldy hay, sick cows and rat poison.

When you want to change the world, a good invention helps. But that is just the start.

Take the story of Mike Davidson and Mike Smith: They wanted to change the world of dental hygiene with a new kind of toothbrush.

Three years ago, their brushes were rolling off the assembly line, ready for consumers. But then the pair ran into a business buzz saw, and it changed the way they saw the business of invention forever.

A prototype of what could be the next generation of space stations is currently in orbit around the Earth.

The prototype is unusual. Instead of arriving in space fully assembled, it was folded up and then expanded to its full size once in orbit.

Even the most commonplace devices in our world had to be invented by someone.

Take the windshield wiper. It may seem hard to imagine a world without windshield wipers, but there was one, and Mary Anderson lived in that world.

In 1902, Anderson was visiting New York City.

Scientists are about to get an up-close and personal look at the planet Jupiter's most famous landmark, the Great Red Spot.

NASA's Juno spacecraft will be directly over the spot shortly after 10 p.m. ET Monday, July 10, about 5,600 miles above the gas giant's cloud tops. That's closer than any spacecraft has been before.

The spot is actually a giant storm that has been blowing on Jupiter for centuries. It's huge, larger than Earth in diameter.

Twenty years ago Tuesday, a plucky little probe named Pathfinder landed at Ares Vallis on the surface of Mars.

It didn't land in the traditional way, with retrorockets firing until it reached the surface. No, Pathfinder bounced down to its landing site, cushioned by giant air bags. It was a novel approach, and the successful maneuver paved the way for a similar system used by the twin rovers Spirit and Opportunity in 2003.

The war in Syria is a conflict of the social media age. Everyone — the rebels, the government, ordinary citizens, everyone — has a cellphone.

And that means almost no bad deed goes unrecorded by someone.

NASA's Juno spacecraft has spotted giant cyclones swirling at Jupiter's north and south poles.

That's just one of the unexpected and puzzling findings being reported by the Juno science team.

Astronomers are offering the general public a once-in-a-lifetime opportunity: the chance to discover a new planet in our solar system.

Many astronomers now think there may be a massive, undiscovered planet lurking in the far reaches of our solar system. Right now, however, the existence of this planet is theoretical. So the hunt is on to actually capture an image of it.

It's easy to feel overwhelmed by the size of the refugee problem confronting the world today. According to the U.N. Refugee Agency, more than 30,000 people are forced to flee their homes every day because of conflict or persecution.

But one energetic university professor in Germany decided that bemoaning and hand-wringing wasn't solving anything, so she decided to take action.

The scientific community has been roiled by the Trump travel ban.

Like tens of thousands of residents of the seven Muslim-majority countries, scientists have been stranded — cut off from their labs, worried they won't be able to attend upcoming conferences. And even though the ban has been temporarily reversed by a court order, they are uncertain about what the future holds — and the implications for their work.

Consider the case of Ph.D. candidate Hanan Isweiri. She left her lab at Colorado State University to fly home to Libya after the death of her father.

Imagine being able to collect the DNA of a human ancestor who's been dead for tens of thousands of years from the dirt on the floor of a cave. Sounds fantastic, but scientists in Germany think they may be able to do just that. If they're successful, it could open a new door into understanding the extinct relatives of humans.

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