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In order to see the red of a sunset or the green of spring leaves, developing human eyes need to get the right hormone at the right time.

That's the finding of a team of scientists who studied how color vision develops using hundreds of human retinas grown in the lab.

Indonesia is winding down its search and rescue operations, with thousands of people believed to be still missing after a devastating earthquake and tsunami struck last month on the island of Sulawesi.

The official death toll for the disasters stands at 2,073. But the national disaster agency says that the number of those still missing could be as high as 5,000, after the strength of the quake caused the ground to liquefy and swallow up buildings and people.

Search efforts had been set to end Thursday, but were extended to Friday.

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TERRY GROSS, HOST:

Updated at 4:35 p.m. ET

After the huge sell-off Wednesday, U.S. stocks fell sharply again Thursday. At one point, the Dow was down nearly 700 points. By late afternoon, it had regained some ground but closed down 546 points or a little more than 2 percent.

Over the past two days, the Dow has lost 1,378 points. The S&P 500 was down 2 percent for the day. The Nasdaq lost 1.25 percent.

Ensuring that people with pre-existing health conditions can get and keep health insurance is the most popular part of the Affordable Care Act. It has also become a flashpoint in this fall's midterm campaigns across the country.

And not only is the ACA protection, which mostly applies to people who buy their own coverage, at risk. It's also possible that pre-existing condition protections that predate the federal health law could be in play.

Updated at 4:55 a.m. ET

Tropical Storm Michael rampaged through South Carolina, North Carolina and finally southeastern Virginia on Thursday, before heading for the Atlantic Ocean.

It's hard to make time for history books when there is so much history crashing down on us every single day — and especially when that history is divisive, aggressive and seemingly never-ending.

A Soyuz rocket booster failed during the launch of a capsule carrying NASA astronaut Nick Hague and Russian cosmonaut Alexey Ovchinin on Thursday, forcing officials to abort their mission. The capsule made a "ballistic landing" and rescue teams recovered the pair, who are reportedly in "good condition," NASA says.

Hague and Ovchinin launched from the Baikonur Cosmodrome in Kazakhstan at 4:40 a.m. ET, heading to join the crew of the International Space Station. But more than a minute after launch, their Soyuz MS-10's booster failed.

Dave Huhn is a sheriff's deputy for Montezuma County, Colo., a stretch of sagebrush mesas and sandstone cliffs bordering Utah, Arizona and New Mexico, home to Mesa Verde National Park, where ancestral Puebloans' cliff dwellings still stand.

Huhn specializes in the complex world of water law. His job has become more important in this region after a series of hot, dry summers have made farmers more desperate for water, and more willing to steal it or go to battle over it.

"You're bouncing off the atmosphere."

Early in director Damien Chazelle's First Man, this is one of the cautions given to Neil Armstrong (Ryan Gosling) during his pilot training, years before he walked on the moon. That idea of the barrier between Earth and space, the violence of making the journey through it and the almost mystical experience of being on the other side of it forms the spine of the film.

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