In a freshwater pond, it's "eat or be eaten." A dragonfly larva eats a midge; a water beetle larva eats a damselfly larva. Snail larvae grow. A beetle larva eats one. Up close, we see the eating ...

Dragonfly larvae sampled from Cape Cod and Minuteman National Historical Park recently helped tell a much bigger story about mercury pollution in the U.S. A national study published this week in the ...