Explainer

Aerial view of four children joyfully swimming in clear blue water on a sunny day

A survey of nearly 1,800 teenagers found better water-safety knowledge went with less risky swimming, but students who felt highly capable in the water and scored high in sensation seeking were still the ones most likely to take chances

Nearly 1,800 junior high school students in central China took part in a survey that asked how much they knew about staying safe in the water, how strongly they chased excitement, how confident they felt about their swimming and how often they accepted risky situations in the pool or open water. In the final statistical…

Hands holding VR headset for immersive virtual reality experience

Space Explainer

Twenty-five South Pole winter-over crew members completed 16 VR and laptop conditions, and the Amundsen-Scott study found longer nature scenes scored highest overall while individual differences suggested future astronauts may need more choice, longer sessions and sharper visuals

Person enjoying a panoramic view of the ocean from a scenic coastal cliff

Humans Explainer

Fifteen women aged 45 to 64 described how looking out to sea became a repeated self-care practice, as a qualitative study traced the relief they expected at the coast and the steadier feeling they carried back into daily life

A sailboat glides peacefully on Lake Michigan under a clear summer sky

Health Explainer

Eight adolescents with rare skeletal disorders completed a five-day sailing program with full adherence and no serious adverse events, while early shifts in balance, gait, upper limb function and fear of movement pointed to a feasible rehabilitation test that still needs larger trials

A person's hand gripping an aircraft control inside a cockpit during daytime

Oceans Explainer

Forty volunteers completed 960 simulated submersible tasks and a BMC Psychology model found simulated volunteer performance peaked inside narrow visual, auditory, cognitive and movement workload bands before falling again, while the result still needs validation with actual oceanauts in a manned submersible

Playful dolphins leap through ocean waves at Orange Beach, Alabama

Oceans Explainer

When 1,138 Americans were asked what the ocean had taught them and which moments stayed with them most, their answers kept circling back to wildlife, family closeness, relief from strain and small acts of care that made stewardship feel personal instead of distant

A mesmerizing close-up of bubbles in underwater scenery, creating a dynamic visual

Oceans Explainer

What Is a Turbidity Current?

Worker in hard hat and life vest operates machinery on an offshore platform above ocean waters

Oceans Explainer

How Do Scientists Measure Ocean Currents?

Scientists measure ocean currents with mechanical and electronic current meters, drifting buoys, ship surveys, moorings, satellites and autonomous vehicles. One of the most versatile tools is the acoustic Doppler current profiler, or ADCP, which uses sound to measure water velocity at many depths at once. No single instrument captures every current. A mooring records change…

Tranquil coastal shoreline at low tide with calm blue ocean and distant horizon

Oceans Explainer

Tide Table vs. Tide Chart: What Is the Difference?

A tide table lists predicted times and heights of high and low water, while a tide chart usually plots the predicted water level as a curve through time. Both may be generated from the same harmonic prediction. The table favors exact values; the chart makes the day’s changing pattern easier to see. Neither product should…

Drone aerial shot capturing unique patterns of sand and water at a coastal area in Victoria, Australia

Oceans Explainer

Ebb, Flood and Slack Water: How Tidal Currents Change

Flood current moves water toward shore or up an estuary, ebb current moves it away from shore or down an estuary and slack water is the interval around a current reversal when speed is near zero. These phases describe horizontal tidal motion, not the vertical height of the tide. Many coasts pass through flood, slack…

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