CLIMATE September 5, 2023 2:02 pm What are meteorological seasons? Why are there two first days of fall? Here’s what you should know about astronomical and meteorological calendars. US & World Videos 1:29 US gymnast Jordan Chiles talks family, wedding planning and her surprising love for jazz 1:40 Track and field star Laulauga Tausaga has already made history. Can she do it again at the Paris Olympics? 2:14 Swimmers Gretchen and Alex Walsh aren't just sisters – they're also Olympic hopefuls 2:39 Man dead after gunshots during party at event hall in Waterbury 1:46 Dogs, cats, turtles, tarantulas: US Olympians love their pets