What are the white lines behind planes? We hopped on a NASA flight researching them.

USA TODAY joined a NASA research flight exploring the climate impacts of contrails and sustainable aviation fuel.

Advertisement Read in browser Read in browser Travel Wed Nov 8 2023 Welcome aboard NASA's flight to the greener future | Cruising Altitude USA TODAY joined a NASA research flight exploring the climate impacts of contrails and sustainable aviation fuel. READ MORE Advertisement Universal Orlando tickets just jumped higher than some Disney prices The price increases apply to both kids and adults at Universal Studios Florida, Islands of Adventure and Volcano Bay. READ MORE Here's how long you'll wait for a passport now U.S. passport processing times dropped again this week, the State Department said. READ MORE 7 best Disney cruises for families in 2024 From being among the first to visit Disney's new private island to enjoying a Pixar-themed day, here are the Disney cruise experiences you can't miss. READ MORE Book a stay at Martha Stewart's New York farm this Thanksgiving Martha Stewart will welcome two guests to stay at her New York farm for a Thanksgiving-inspired stay this month through Booking.com. READ MORE How Dolly Parton shares her light, from heartfelt song to HeartSong Dolly's light shines brightly at Dollywood, home to her new resort inspired by the Great Smoky Mountains. READ MORE Your hotel room is germier than you think: #CleanTok is on it The sink faucet in a shared home has been found to have 60,000 times as many germs as a toilet seat. A #CleanTok expert shares easy ways to sanitize. READ MORE Roller coaster-waterslide hybrid coming to this cruise ship Norwegian Aqua will feature a roller coaster-waterslide hybrid when it debuts in April 2025. READ MORE The 10 best Christmas markets in Europe to visit this year From Dresden, Germany's Christkindlmarkt to lesser-known holiday markets in Romania, here are 10 Christmas markets in Europe you must visit. READ MORE This national park is absolutely legendary Haleakalā National Park, on the island of Maui, is steeped in Hawaiian history and lore. READ MORE Sign up for the news you want Exclusive newsletters are part of your subscription, don't miss out! We're always working to add benefits for subscribers like you. SEE ALL NEWSLETTERS ➔ SEE ALL NEWSLETTERS ➔ Advertisement Follow Us Problem viewing email? View in browser Unsubscribe  •  Manage Newsletters  •  Terms of Service  •  Privacy Policy/Your California Privacy Rights  •   Privacy Notice  •  Do Not Sell My Info/Cookie Policy  •  Feedback