Sara Rathner is a NerdWallet travel and credit cards expert. She has appeared on the “Today” show and CNBC’s “Nightly Business Report,” and has been quoted in The New York Times, The Washington Post, ...

Aug. 22, 2025 — Astronomers using AI have captured a once-in-a-lifetime cosmic event: a massive star’s violent death triggered by its black hole companion. The explosion, known as SN 2023zkd, not only ...