Knee-deep in a river of northern Thailand, scientists scooped up some sand with a net and sifted through it. Hidden between the grains, they found two “rare” creatures — and rediscovered a species not ...

Scientists scooped sand from a riverbed in Thailand and found two nymphs of rare mayfly species not seen in 22 years, a study said. Photo from Kwanboon and Boonsoong (2025) Knee-deep in a river of ...

Using tweezers, Diane Madl picked through debris strained from the Nescopeck Creek, teasing out nymphs, crayfish, salamanders ...