Various forms of mercury are released naturally by volcanoes and weathering of rocks and soil. Human activities, such as mining or burning fossil fuels, can also release the element into the ...

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 ...

(a) Number of observation records per 500-m elevational band. (b) Number of genera and the number of their observation records in the database. (c) Cumulative number of observation records of each ...

A years-in-the-making model developed by the National Park Service and U.S. Geological Survey could offer a deeper look at mercury concentration levels on federal lands across the country — including ...

As one of the first-ever evolved winged insects, dragonflies have inhabited the earth for almost 300 million years. We instantly recognize these animals by their beautiful outer appearance and their ...

At an aquatic laboratory nestled in Warrenville's Blackwell Forest Preserve, freshwater mussels grow in beakers, fish race up and down long holding tanks, and rare endangered dragonfly larva munch on ...

Great Smoky Mountains National Park was one of four parks in the eastern U.S. where the Dragonfly Mercury Project got its start. Easier to catch and cheaper to test than fish, dragonfly larvae can be ...

The map above shows sites where dragonfly larvae were collected for the Janssen et al. 2024 paper. Dragonfly larvae were collected at three types of sites including wetlands, lotic systems (flowing ...

With 360-degree vision, bright-colored bodies that sparkle jewel-like in the sun, and acrobatic flight patterns reaching speeds of nearly 35 miles per hour, dragonflies are some of the more glamorous ...

(Nanowerk News) It is a high-speed movement: within fractions of a second the mouthparts of the dragonfly larvae spring forwards to seize its prey. For decades, researchers had assumed that this ...

Tadpoles grow pumped-up tails when stressed out by the threat of predators nearby, a new study finds. These beefed-up tails help the tadpoles escape predators such as dragonfly larvae, according to ...