Despite their eerie appearance, deep-fried stone worms are a sought-after specialty of Vietnam’s Thai ethnic group.

"These are very sensitive worms," he says. "Any change in the water content and the salinity of the soil (which can happen when poachers dig out chunks of them) can affect the remaining ones too." ...

You'll go looking for earthworms by using mustard water to bring them to the surface of bare soil. The class can compare the number of worms found in different locations and discuss what this means ...

They claim that during the digging process, the old water pipeline was damaged, and the contractor also broke the sewage ...