Artificial light from major coastal cities can disrupt the nighttime biology of sharks, according to new research that provides the first-ever measurements of melatonin—a hormone tied to biological rhythms—in wild sharks.

A new 17-year study of loggerhead sea turtles nesting in Cabo Verde reveals exactly this tension.

A new study led by a University of Hawaiʻi at Mānoa researcher shows that avian malaria can be transmitted by nearly all forest bird species in Hawaiʻi, helping explain why the disease is present almost everywhere mosquitoes are found across the islands.

In a warming Arctic, noise from growing shipping traffic is interfering with the ability of narwhals to hunt and communicate.

Reducing wolves to protect endangered caribou doesn’t always deliver the expected results—and the shape of the land may be the deciding factor.

In parts of the Arctic, polar bears are in decline as sea ice, which they depend on to hunt, disappears. That is not the case, however, on the Norwegian island of Svalbard, where bears have actually managed to grow more plump even as ice melts away.

Solar panels on bodies of water in the northeastern U.S. might generate renewable energy but could also carry risks for birds, especially water birds.

A new analysis of air quality data from the past 70 years shows that Canada’s record wildfire smoke in 2023 is part of a broader, continent-wide trend toward smokier skies across North America.

Forensics experts gather DNA to understand who was present at a crime scene. 

PFAS, or per- or polyfluoroalkyl substances, are ubiquitous in modern life. First produced at the end of World War II, these chemicals are in everything from furniture and cosmetics to food packaging, non-stick pans and clothing.