A urine drug test can quickly detect both illegal and prescription drugs in a person’s system. Doctors, sports officials, and many employers require these tests. Signs of drug use can remain in ...

A humpback whale urinating near Hawaii. Credit: Lars Bejder/NOAA Scientists have long understood that microbes, zooplankton, and fish are vital sources of recycled nitrogen in coastal waters.

Whales carry tons of nutrients in their pee thousands of miles across the oceans. © Martin van Aswegen, NOAA Permit 21476 In 2010, two researchers in the U.S ...

Sediments play a crucial role in river hydrology, influencing flow, flooding, and ecosystems. Explore their journey from mountains to the sea and see how human actions alter this natural process. What ...

The interphase interaction between water flow and sediment and particle collision in sediment laden flow will modulate the flow turbulence. Due to the complexity of suspended sediment movement, the ...

More information: Iason-Zois Gazis et al, Monitoring benthic plumes, sediment redeposition and seafloor imprints caused by deep-sea polymetallic nodule mining, Nature Communications (2025).

Dark amber, brown, or red-tinted urine may be a symptom of kidney failure. You should contact your doctor if you notice persistent changes in the color of your urine. An increase in proteins ...

Urine was used as fertiliser in ancient Rome and China. Now farmers in Vermont are bringing this practice back to boost harvests and grow crops in a more sustainable way. When Betsy Williams goes ...

Mangrove forests are crucial wetland ecosystems located in tropical and subtropical intertidal zones, but they have become extensively degraded. As a viable ecological restoration strategy, the ...

A 10-panel drug test checks for prescription drugs as well as recreational drugs that are likely to be misused or abused. These typically include marijuana, opioids, amphetamines, and cocaine. A urine ...