Environment and nature

This July 13, 2019 photo provided by Guangzhou Wolbaki Biotech shows male Aedes albopictus mosquitoes in a container at the company's lab in Guangzhou, China, prepared for release. Researchers zapped the insects with a small dose of radiation and infected them with a virus-fighting bacterium called Wolbachia. Males and female mosquitoes with different types of Wolbachia won’t have young that survive. So researchers intentionally infect males with a strain not found in the area and then release the insects. (Guangzhou Wolbaki Biotech via AP)

Aleksandar Nalbantjan iStock / Getty Images Plus

This image provided by the University of Tuebingen in Germany shows the Apidima 1 partial cranium fossil, right, with a piece of rock still attached, and its digital reconstruction from a posterior view, middle, and a side view, left. The rounded shape of the Apidima 1 cranium is a unique feature of modern humans and contrasts sharply with Neanderthals and their ancestors. (Katerina Harvati/University of Tuebingen via AP)

In this Feb. 13, 2018, photo released by the U.S. Air Force, an RQ-4 Global Hawk is seen on the tarmac of Al-Dhafra Air Base near Abu Dhabi, United Arab Emirates. Iran's Revolutionary Guard shot down a U.S. RQ-4 Global Hawk on Thursday, June 20, 2019, amid heightened tensions between Tehran and Washington over its collapsing nuclear deal with world powers, American and Iranian officials said, though they disputed the circumstances of the incident. (Airman 1st Class D. Blake Browning/U.S. Air Force via AP)

(AP Photo/Matt Dunham)

FILE - In this Oct. 29, 2018, file photo, young plaintiffs stand on the steps of the United States District Courthouse during a rally in Eugene, Ore., to support a high-profile climate change lawsuit against the federal government. A lawsuit by a group of young Americans accusing the U.S. government of harming them by having fostered a fossil-fuels energy system faces a major hurdle Tuesday, June 4, 2019, when a federal appeals court hears oral arguments on whether the case should proceed. (Andy Nelson/The Register-Guard via AP, File)

This picture taken on May 8, 2019, shows two newly born Chacoan peccaries in their enclosure at the Prague zoo, Czech Republic. Prague's zoo says two Chacoan peccaries have been born in the park in May for the first time, a welcome step in efforts to save a species that was once considered long extinct. (Petr Hamernik/Zoo Praha via AP)

FILE - In this May 20, 2018, file photo, Nepalese veteran Sherpa guide, Kami Rita, 48, waves as he arrives in Kathmandu, Nepal. Rita has scaled Mount Everest for a 23rd time, breaking his own record for the most successful ascents of the world's highest peak. (AP Photo/Niranjan Shrestha, File)

This recent but undated photo provided by the National Park Service shows Ledge Geyser in Yellowstone National Park, within days of its most recent eruption that began on April 28, 2019. The noisy geyser in Yellowstone has roared back to life after three years of quiet. Ledge Geyser is one of the biggest in Yellowstone's Norris Geyser Basin. The Billings Gazette reports the geyser shoots hot water at an angle up to 125 feet high and a distance of 220 feet. (National Park Service via AP)