EditorialShambhu Chaudhary holds the pills he takes to control dizziness, a lingering effect of his years working in extreme heat in Qatar, in Bhokteni, Nepal in October 2022. (Purnima Shrestha/The New York Times)
EditorialRafael Nadal of Spain hits a backhand return during his quarter finals match against Denis Shapovalov of Canada at the Australian Open in Melbourne, Australia on Jan. 25, 2022. Nadal defeated Shapovalov. (Alana Holmberg/The New York Times)
EditorialRafael Nadal of Spain hits a backhand return during his quarter finals match against Denis Shapovalov of Canada at the Australian Open in Melbourne, Australia on Jan. 25, 2022. Nadal defeated Shapovalov. (Alana Holmberg/The New York Times)
EditorialAmerican employees at the U.S. Consulate in Guangzhou, China reported hearing strange sounds, followed by headaches, dizziness, blurred vision and memory loss. (Lam Yik Fei/The New York Times)
EditorialAmerican employees at the U.S. Consulate in Guangzhou, China reported hearing strange sounds, followed by headaches, dizziness, blurred vision and memory loss. (Lam Yik Fei/The New York Times)