The sky isn't just blue—airglow makes it green, yellow and red too
Look up on a clear sunny day and you will see a blue sky. But is this the true color of the sky? Or is it the only color of the sky?
Look up on a clear sunny day and you will see a blue sky. But is this the true color of the sky? Or is it the only color of the sky?
Astronomy
Dec 30, 2022
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Researchers from Italy, Chile and Galicia have studied and compared the light pollution levels at major astronomical observatories across the world. The study shows that light is polluting the sky above most observatories ...
Astronomy
Dec 20, 2022
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158
New research reveals that the animals that perceive time the fastest are those that are small, can fly, or are marine predators.
Plants & Animals
Dec 20, 2022
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10
The number of simultaneously acting global change factors has a negative impact on the diversity of plant communities—regardless of the nature of the factors. This is one of the findings of a recent study by ecologists ...
Ecology
Dec 19, 2022
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32
Griffith University research reveals that when combinations of human-caused stressors fluctuate, replicating more realistic environmental conditions, it vastly changes their impact on wetland habitats.
Ecology
Dec 16, 2022
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52
There has been significant interest in photonics over the last decade due to their prospects in creating functional devices both for near-infrared (NIR) and mid-infrared (MIR) wavelengths. Optical modulators are crucial photonic ...
Optics & Photonics
Dec 12, 2022
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11
Urban smog is a major threat to human health. New sensors and data-collection techniques will help to improve air quality.
Planetary Sciences
Nov 2, 2022
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Stake out in Pennsylvania's Cook State Forest at the right time of year and you can see one of nature's great light shows: swarms of fireflies that synchronize their flashes like strings of Christmas lights in the dark.
Mathematics
Oct 31, 2022
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410
Birds attracted by the glow of artificial light at night are drawn into areas where they are also exposed to higher concentrations of airborne toxic chemicals, according to a new study.
Plants & Animals
Oct 25, 2022
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71
As the sun sets, bumblebees revisit "profitable" flowers they encountered during the day, new research suggests.
Plants & Animals
Oct 19, 2022
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25