African lions are 'endangered,' must be protected: US

African lions are at risk of extinction and will be protected under US law as an endangered species, authorities declared Monday, months after a high-profile killing stoked global outrage.

How LED lighting treatments affect greenhouse tomato quality

To satisfy increasing consumer demand for locally grown, fresh tomatoes during off-seasons, greenhouse tomato growers often need to rely on supplemental lighting. Tomato growers are looking to light-emitting diodes (LEDs), ...

Twisted magnetic fields give new insights on star formation

Using new images that show unprecedented detail, scientists have found that material rotating around a very young protostar probably has dragged in and twisted magnetic fields from the larger area surrounding the star. The ...

Mars gullies likely contain 'no water', study says

Months after scientists announced "the strongest evidence yet" of liquid water on Mars, a study Monday said there was none at least in the valleys carved into numerous Red Planet slopes.

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