One in three large American rivers has changed color over the last 36 years, shifting from shades of blue to green and yellow, raising concerns about the health of U.S. waterways, according to an analysis of nearly 235,000 satellite images published in the journal Geophysical Research Letters.

Maybe you’re like us. We’re the folks who are on our smartphones almost all the time, even when we’re with others. 

New data suggest that nearly all COVID-19 survivors have the immune cells necessary to fight re-infection.

Observations of Earth’s atmosphere show that thunderstorms are often stronger in the presence of high concentrations of aerosols — airborne particles too small to see with the naked eye.

Anyone who has ever hesitated in front of a trash bin knows the problem: It’s hard to determine what can be recycled. Consider the average potato chip bag.

It lays eggs, but nurses, it is toothless, has a venomous spur, has webbed feet, fur that glows and has 10 sex chromosomes.

Using copper foil, glass containers and a conventional household microwave oven, University of Wyoming researchers have demonstrated that pulverized coal powder can be converted into higher-value nano-graphite.

For more than seven years, a mysterious wasting disease has nearly killed off sea star populations around the world. Some of these species stand at the brink of extinction.

Fishermen contend with regulations, natural disasters, and the ups and downs of the stocks they fish, along with many other changes. 

In the future, the Antarctic could become a greener place and be colonised by new species.