Explainer

A closeup of a hand holding a stone in shallow water with pebbles

Twenty-nine university students faced six minutes of noise and warming one hand in 40 C water for two minutes reversed the stress-linked fingertip temperature drop measured in the opposite hand

Twenty-nine healthy university students sat through a short burst of noise in a randomized trial and a simple change in the middle of that exposure produced the study’s clearest result. When participants placed one hand in warm water for two minutes, the researchers saw the opposite hand recover from a stress-linked drop in fingertip temperature…

Space Explainer

Dynamic lighting lifted several thinking tasks in a simulated space station while 30 tired volunteers reported no extra alertness or better mood under the changing light

Three women celebrate on a yacht at sunset, enjoying a cheerful and memorable time

Health Explainer

Sixty breast cancer survivors spent one week learning to sail while joining group psychology sessions in a natural setting and quality of life rose in physical and emotional areas even as anxiety stayed at a moderate level, a small uncontrolled pilot found

Feet soaking in an outdoor bathtub with floating flowers and greenery for relaxation

Health Explainer

Twenty-five adults who often felt stressed alternated four weeks of bicarbonate ionized baths with regular bathing and the bath-tablet phase shortened the time needed to fall asleep, improved Pittsburgh sleep scores and steadied several immune markers in a small open-label crossover trial

Space Explainer

Sixteen volunteers received 30 minutes of artificial gravity through 60 days of head-down bed rest, yet brain scans during memory and dual-task testing changed much like those of eight untreated controls, suggesting the daily centrifuge sessions did not reduce the brain’s extra workload in this spaceflight analog

Water Explainer

What Is an Alluvial Aquifer?

Water Explainer

How Does E. Coli Get Into Lakes?

Water Explainer

Pond Food Chain: From Algae to Fish and Birds

A simple pond food chain runs from algae to zooplankton, then to small fish and larger predators. A second route begins with aquatic plants or attached algae, passes through insects and snails and reaches fish, frogs or birds. Real ponds contain both routes plus many cross-connections, so ecologists describe a food web rather than one…

Water Explainer

Wetland Food Web: Producers, Consumers and Decomposers

A wetland food web connects organisms through the movement of food energy and nutrients. Producers capture energy. Animals consume living material or organic remains, while decomposers break the remains into simpler compounds. Many wetlands rely heavily on detritus made from dead plant tissue. The exact web differs among wetland types. Water depth selects which organisms…

Scientists_surveying_inland_water_from_boat

Water Explainer

What Is a Limnologist?

A limnologist is a scientist who studies inland waters as connected physical, chemical and biological systems. The field includes freshwater and saline lakes, reservoirs, rivers, wetlands and groundwater. A limnologist may investigate how a lake mixes, why oxygen declines or how organisms respond to changing water quality. The job title is less standardized than titles…

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