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The giant sequoias of California are experiencing a rebirth. A massive wildfire in 2015 threatened numerous sequoia groves. The charred ground is coming back to life, in part, because of the fire.

How is a rare strain of malaria spreading near cities in Southeast Asia? That's the question that's been puzzling a team of scientists. And they're using drones to find the answer.

Rather than rest in retirement, a group of volunteers is restoring land in Arizona's Ironwood Forest National Monument to its natural habitat. Their main goal is to eliminate invasive buffelgrass, which is taking over and causing a fire hazard. It's no small task — they've removed it from the same place 40 times.

The insurance industry is bracing to pay hundreds of millions of dollars in claims to people whose homes were destroyed in major forest fires. But with government policies that indirectly encourage building in high-risk areas, insurance premiums for those living in the woods are unlikely to rise much.

Liberia is launching its first large-scale military operation since the end of its brutal civil war. Liberia's army, which has been trained by the U.S. military over the last six years, is going after mercenaries and rebels who are using thick forest as cover from which to launch ambushes in neighboring Ivory Coast.

Hundreds of people in Colorado are coming to grips with a wildfire that tore through Waldo Canyon. Authorities say more than 340 homes were destroyed. Human remains were found in the rubble of a burned-out suburban home, and police say a second person is missing.

President Obama visited Colorado Springs on Friday to survey the damage caused by the Waldo Canyon fire, which burned more than 300 homes.

More than two million acres of forest have burned in Alaska this year. NPR's Ailsa Chang talks with climate change researcher Nancy Fresco about the impact these fires have on the Earth's atmosphere.

"If you're an American citizen, you should not be wearing that shirt in America," a man said to the woman in a Chicago park. A police officer who stood nearby and did not help has resigned.

How many trees are there in the world? Some scientists are working on a new estimate.