Search results for relativity

Environment 46 minutes ago

Clean Water Act leaves about 55% of water flowing out of rivers vulnerable to pollution, study suggests

The Supreme Court ruled in 2023 that rivers that only flow in response to weather events—called ephemeral streams—do not fall under the protection of the Clean Water Act. Research published in the journal Science, led ...

Paleontology & Fossils 46 minutes ago

Most pristine trilobite fossils ever found shake up scientific understanding of the long extinct group

Researchers have described some of the best-preserved three-dimensional trilobite fossils ever discovered. The fossils, which are more than 500 million years old, were collected in the High Atlas of Morocco and are being ...

Ecology 58 minutes ago

Predicting chronic wasting disease in counties could prevent spread

Wildlife experts have developed a regional computer model—and user-friendly app—that predicts counties in 16 states where wildlife managers should target their surveillance of chronic wasting disease in deer, helping ...

Bio & Medicine 1 hour ago

Gold nanoparticles kill cancer—but not as thought

Gold particles of the size of billionths of a meter are lethal to cancer cells. This fact has been known for a long time, as has a simple correlation: The smaller the nanoparticles used to fight the cancer cells, the faster ...

Ecology 1 hour ago

Unlocking biodiversity insights from the tropical Andes

Despite hosting some of the world's most biodiverse ecosystems and the urgency of the region's conservation challenges, researchers in Bolivia, Ecuador, and Peru often struggle to share their unique insights into these complex ...

Space Exploration 1 hour ago

The science behind splashdown—aerospace engineer explains how NASA and SpaceX get spacecraft safely back

For about 15 minutes on July 21, 1961, American astronaut Gus Grissom felt at the top of the world—and indeed he was.

Archaeology 1 hour ago

Lucy, discovered 50 years ago in Ethiopia, still towers over our understanding of human origins

In 1974, on a survey in Hadar in the remote badlands of Ethiopia, U.S. paleoanthropologist Donald Johanson and graduate student Tom Gray found a piece of an elbow joint jutting from the dirt in a gully. It proved to be the ...

Analytical Chemistry 2 hours ago

What's really inside vapes? We pulled them apart to find out

While vapes or e-cigarettes first appeared around 20 years ago as an alternative to smoking, their prevalence and use have increasingly become problematic.

Plants & Animals 2 hours ago

World's smallest living elephants listed as Endangered on Red List

A newly confirmed elephant subspecies is already at risk of extinction.

Plants & Animals 2 hours ago

Three new extinct walnut species discovered in high Arctic mummified forest

In a new study, scientists describe three new, but long-extinct, walnut species on an island above the Arctic Circle. The fossils were discovered further north than any known walnut species, living or extinct, and represent ...

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