Search Content

It won’t prevent Armageddon, but a simple ground-based laser system could nudge small pieces of space junk away from satellites to prevent collisions, a new study suggests.

The proposed system uses photons generated by a medium-power laser and aimed into space through a 1.5-meter telescope. The photons exert pressure on space debris in low-Earth orbit, gently pushing the objects...

Researchers have made the first maps of corporate stock ownership for the stock markets of a large number of countries, 48 in all. The new network analysis technique reveals “backbones” in these ownership networks: big players that together own a controlling stake in more than 80 percent of the companies in the markets.

In these network diagrams, nodes represent either a company with...

Just an hour's swim in water lightly contaminated with a common pollutant can turn fish into rejects with an odor that causes their untainted schoolmates to shun them, researchers say.

In a lab test, brief exposure to 4-nonylphenol (4-NP), a surfactant used in many soaps, detergents, and other products, disrupted the normal tendency of banded killifish (Fundulus diaphanus) to...

Pharmaceuticals ranging from painkillers to synthetic estrogens can harm aquatic life when they enter waterways through human excreta, hospital and household waste, and agricultural runoff. Now, researchers have shown that there's another way for such drugs to get into the environment: A treatment plant in India that processes wastewater from pharmaceutical manufacturers discharges highly...