There is a lot scientists don't understand about mercury — namely, how it becomes its most toxic form and why our bodies ...

Periodical cicadas have a longer time underground than annual cicadas. They live underground as nymphs for 13 or 17 years, emerging from holes in the ground and then molting into adults.

Cicadas are back at it again in 2025, already emerging in droves to announce the approach of summer with their screeches. If you live in the Eastern U.S., get ready to meet (and hear) Brood XIV ...

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For the past several weeks, periodical cicadas have emerged in the wooded areas around my home. Their singing filled the air, ...

After hatching, cicada nymphs burrow 6-18 inches underground, where they will remain for 13 or 17 years. The next periodical cicada broods are expected in Ohio in 2027, 2033, 2036, and 2038.

Brookhaven National Lab has received some noisy guests this summer—a brood of cicadas that have been incubating for the last ...

Shortly after a 17-year cicada nymph hatches from its egg, it burrows into the ground, where it spends—as its name suggests—the first 17 years of its life,” Britannica notes.

After the female has laid its eggs, the new cicadas -- called nymphs -- will hatch about six to seven weeks later, fall to the ground, burrow underground and stay there for another 17 years ...

Brood X cicadas molt one final time as they emerge, leaving exoskeleton remnants on trees and other vertical surfaces. As with all these photos, these were taken in Maryland in 2004.