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Mark Thiessen

Aerosol from cans sometimes contains ozone-depleting substances called chlorofluorocarbons, or CFCs.

European artifacts provide clues to where colonists retreated after abandoning Roanoke Island.

Astronomer and astrophysicist Frank Drake, seen here in Santa Cruz, California, was instrumental in shaping scientific searches for other possible civilizations in the galaxy.

Horseshoe crab blood appears blue due to its high copper content.

Atlantic horseshoe crabs are facing increasing pressure for their toxin-sensitive blood.

Even the simplest touch to skin sets off neural messaging so complex that scientists are only beginning to mimic it through engineering. At the Johns Hopkins Applied Physics Laboratory, researchers are exploring an approach that uses what’s known as e-dermis: pressure-reactive layered material. When attached to prosthetic hands, like the one holding this e-dermis patch, the material helps turn contact with another surface into a sensation the brain interprets as touch.

Hannah LeBuhn, who suffers from pain in her jaw joints, watches the mesmerizing motion of jellyfish on a virtual reality headset in Luana Colloca's lab at the University of Maryland, College Park.

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