The world’s oldest winged insect is in trouble. How frightened should we be?

(Mustafa Hussain for The Washington Post) Mayflies are among nature’s best environmental sentinels — and their current message to us is grim September 19, 2022 at 10:03 a.m. EDT One morning in April, I waded into a cold mountain stream in Virginia called the Hazel River. I was there to fish for brook trout but … Read more